Tehran

Tehran — encyclopedia article coming soon.

Tehran serves as the medical hub of Iran, boasting an extensive network of public and private healthcare facilities. The city is home to some of the Middle East's most prominent medical universities and research centers.

* Major Hospitals: Imam Khomeini Hospital Complex (one of the largest public hospitals in the country), Milad Hospital (a massive specialized facility), Shariati Hospital, and Sina Hospital. * Specialized Care: Mahak Hospital specializes in pediatric cancer care, while the Noor Eye Hospital is a leading ophthalmology center. * Pharmacies: The 13 Aban Pharmacy is famous city-wide for stocking rare and specialized medications. * Medical Education: Tehran University of Medical Sciences (TUMS) and Shahid Beheshti University of Medical Sciences lead the nation's medical research and training.

Emergency services in Tehran are centrally managed. Callers can reach operators who speak basic English, though Persian is the primary language.

* Police: 110 * Ambulance / Medical Emergency: 115 * Fire Department: 125 * Iranian Red Crescent (Search & Rescue): 112

The Tehran Disaster Mitigation and Management Organization coordinates responses to natural disasters, playing a critical role given the city's location near active fault lines.

Tehran is the economic heart of Iran, hosting a vibrant mix of traditional commerce and a rapidly growing tech startup ecosystem.

* Traditional Commerce: The Grand Bazaar of Tehran remains a massive economic engine, historically influencing both national commerce and politics. * Commercial Districts: Valiasr Street, Mirdamad Boulevard, and the Abbas Abad neighborhood serve as modern financial and corporate hubs. * Retail: The city features luxury shopping centers like Palladium Mall, Galleria, and the sprawling Iran Mall, which is one of the largest shopping malls in the world. * Startup Ecosystem: Often considered the "Silicon Valley of Iran," Tehran is home to major tech incubators and the Pardis Technology Park (located just outside the city), fostering a thriving environment for local entrepreneurs.

Tehran offers a rich culinary landscape, blending traditional Persian flavors with regional and international cuisines.

* Signature Dishes: Chelo Kebab (saffron rice and meat skewers), Ghormeh Sabzi (herb, kidney bean, and meat stew), and Dizi (a hearty lamb and chickpea stew served in traditional stone pots). * Famous Eateries: Moslem Restaurant and Sharaf El Islam in the Grand Bazaar are legendary for their Tahchin (baked saffron rice cake) and kebabs. Nayeb is famous for pioneering the modern Chelo Kebab restaurant experience. * Street Food: 30 Tir Street is a popular cobblestone street food hub offering everything from traditional Ash (thick soup) to falafel and modern street snacks. * Markets: Tajrish Bazaar in northern Tehran is a spectacular destination for fresh local produce, vibrant spices, nuts, and traditional sweets.

The capital is a fascinating blend of ancient history and modern metropolitan life, anchored by stunning architecture and historical complexes.

* Landmarks: Azadi Tower (the modernist, marble-clad symbol of Tehran) and Milad Tower (the sixth-tallest telecommunication tower in the world, offering panoramic city views). * Palaces & Historic Sites: Golestan Palace (a breathtaking UNESCO World Heritage site featuring Qajar-era architecture), alongside the Sa'dabad and Niavaran Palace complexes in the lush northern foothills. * Museums: The National Museum of Iran, the dazzling Treasury of National Jewels (housed in the Central Bank), and the Carpet Museum of Iran. * Modern Architecture: The Tabiat (Nature) Bridge is an award-winning multi-level pedestrian bridge connecting two public parks over a major highway.

Thanks to its geography at the foothills of the Alborz Mountains, Tehran offers unique recreational opportunities, balancing dense urban life with easy access to nature.

* Skiing: During winter, residents flock to nearby world-class ski resorts like Dizin, Shemshak, and Darbandsar. * Hiking & Mountaineering: The northern trails of Darband, Darakeh, and Kolakchal are immensely popular weekend retreats, lined with mountain streams, teahouses, and small cafes. * Telecabin: The Tochal Complex features a lengthy gondola lift that takes visitors from the city's edge straight up into the snowy mountain peaks. * Recreation Centers: The Enghelab Sports Complex offers extensive public facilities including golf, tennis, swimming, and a highly popular shaded walking trail.

Tehran is surprisingly green, dotted with expansive parks that serve as the city's lungs and prime social gathering spaces.

* Mellat Park: One of the largest and most beautifully landscaped parks in the city, featuring sculptures and a lake. * Jamshidieh Park: A unique, stone-paved park in the northern foothills, offering fresh mountain air, quiet hiking paths, and stunning city views. * Laleh Park: Located in the city center, offering shaded pathways and hosting the Museum of Contemporary Art on its western edge. * Chitgar Park: A massive forest park in the west, heavily utilized for cycling, horseback riding, and picnicking. * Abo Atash & Taleghani Parks: Connected by the iconic Tabiat Bridge, these lively parks are vibrant hubs of activity day and night.

While Tehran features a semi-arid climate, water plays a vital role in its geography and recreational landscape.

* Chitgar Lake (Lake of the Martyrs of the Persian Gulf): An expansive artificial lake in western Tehran, surrounded by leisure facilities, restaurants, and walking paths. * Kan River (Kan Creek): A natural waterway flowing through the western part of the city, originating from the Alborz mountains. * Darband and Darakeh Streams: Mountain runoff streams that flow through northern Tehran's hiking trails, providing a cooling microclimate for hikers and cafes. * Nearby Rivers: The Karaj and Jajrood rivers sit just outside the city limits, feeding the city's critical reservoirs (like the Karaj and Latyan Dams).

Tehran is the cultural capital of Iran, boasting a sophisticated and resilient arts scene.

* Visual Arts: The Tehran Museum of Contemporary Art (TMoCA) holds one of the most valuable collections of Western modern art outside Europe and North America, alongside prominent Iranian works. * Performing Arts: The architecturally stunning City Theater (Teatr-e Shahr) and Vahdat Hall host theater, ballet, and orchestral performances. * Cinema: Tehran is the epicenter of Iranian cinema, historically launching the careers of internationally celebrated auteurs and hosting the annual Fajr International Film Festival. * Galleries: The city features a vibrant independent gallery scene, with spaces like Seyhoun Art Gallery and Shirin Art Gallery championing local and avant-garde artists.

Tehran is predominantly Shia Muslim, but it possesses a rich tapestry of religious minorities that have coexisted in the city for centuries.

* Islam: Major sites include the expansive Grand Mosalla of Tehran, the Imamzadeh Saleh in Tajrish, and the highly revered Shah Abdol-Azim Shrine in neighboring Ray. * Christianity: Saint Sarkis Cathedral serves as a central hub for the city's Armenian Apostolic community. * Zoroastrianism: The Adrian Fire Temple is a focal point for Tehran's ancient Zoroastrian population. * Judaism: The Yousef Abad Synagogue and Abrishami Synagogue serve the local Jewish community, which is the largest in the Middle East outside of Israel.

Sports are an essential part of Tehran's social fabric, with passionate fan bases turning local matches into massive city-wide events.

* Football: The city is divided by a fierce rivalry between Persepolis FC and Esteghlal FC. Both play at the massive Azadi Stadium, which seats roughly 80,000 spectators. * Wrestling: Widely considered the national sport, Tehran has numerous *Zurkhaneh* (traditional gymnasiums for ancient martial arts and strength training) alongside modern freestyle wrestling arenas. * Volleyball & Basketball: Extremely popular both professionally and recreationally, with national matches drawing enthusiastic crowds at the Azadi Indoor Stadium. * Facilities: The Azadi Sport Complex is the largest sporting hub in the country, hosting swimming, cycling, and weightlifting facilities.

The city's calendar is anchored by both deep-rooted cultural traditions and modern civic festivals.

* Nowruz (Persian New Year): In late March, the city experiences a beautiful quiet as many locals travel, while vibrant cultural festivities and traditional *haft-sin* displays dot the parks and squares. * Fajr Festivals: Held every February, this mega-event includes international festivals for film, theater, and music, drawing artists from across the globe. * Tehran International Book Fair: Held annually in May, this massive event draws millions of visitors and acts as a central cultural touchstone for the country. * Religious Observances: The month of Muharram, particularly Ashura and Tasu'a, features large, somber, and deeply communal public processions and street theater (Ta'zieh).

Tehran is the undisputed center of Iran's media industry, housing both state broadcasting and major independent publishing houses.

* Broadcasting: The Islamic Republic of Iran Broadcasting (IRIB) is headquartered here, operating all national TV and radio networks. * Newspapers: Major Persian dailies include *Hamshahri*, *Ettela'at*, *Kayhan*, and *Shargh*. *The Tehran Times* and *Iran Daily* are the prominent English-language publications. * News Agencies: IRNA (Islamic Republic News Agency) and ISNA (Iranian Students' News Agency) are based in the city. * Online Media: Despite strict internet regulations, digital media, independent blogs, and social media channels are heavily consumed and serve as pivotal sources of daily news and culture.

Tehran has been home to countless figures who have shaped Iranian culture, science, and global politics.

* Abbas Kiarostami: Internationally acclaimed, Palme d'Or-winning filmmaker who helped define the Iranian New Wave. * Shirin Ebadi: Nobel Peace Prize-winning lawyer and human rights activist who practiced in Tehran. * Asghar Farhadi: Two-time Academy Award-winning film director (*A Separation*, *The Salesman*). * Ali Daei: Legendary football player and former captain of the Iranian national team, who held the global record for most international goals for over a decade. * Mohammad Mosaddegh: The democratically elected Prime Minister of Iran, a central figure in the city's 20th-century political history. * Marjane Satrapi: Acclaimed graphic novelist and filmmaker (*Persepolis*), whose work chronicles her formative years growing up in Tehran.

The city functions as the corporate headquarters for the vast majority of Iran's major domestic industries and modern tech startups.

* Automotive: Iran Khodro and SAIPA, two of the largest car manufacturers in the Middle East, are headquartered here. * Energy: The National Iranian Oil Company (NIOC), central to the nation's economy, operates from its central Tehran headquarters. * Tech & E-commerce: Snapp! (the leading ride-hailing app) and Digikala (the largest e-commerce platform in the country) represent the city's massive tech presence. * Telecommunications: MCI (Mobile Telecommunication Company of Iran) and Irancell manage the nation's mobile networks from the capital.

Tehran has established sister city and twin town relationships across the globe to foster cultural, political, and economic ties:

* Seoul, South Korea (Commemorated by Tehran Street in Seoul and Seoul Street in Tehran) * Beijing, China * Moscow, Russia * Caracas, Venezuela * Pretoria, South Africa * Havana, Cuba

Tehran is home to a robust network of community and non-governmental organizations, alongside national and international institutions.

* MAHAK (Society to Support Children Suffering from Cancer): One of Iran’s most renowned and trusted charities, running a specialized pediatric cancer hospital in northern Tehran. * Tehran Chamber of Commerce, Industries, Mines and Agriculture (TCCIM): The central hub for local and international business networking, trade development, and economic advocacy. * Iranian Red Crescent Society: Headquartered in Tehran, providing vital disaster relief, youth programs, and health services across the country and the province. * Kahrizak Charity Foundation: A highly respected organization operating a massive sanitarium and care facility for the elderly, disabled, and MS patients in southern Tehran. * United Nations in Iran: Various UN agencies (UNICEF, UNDP, UNHCR) maintain their national headquarters in Tehran, working alongside local NGOs on health, refugee support, and development.

Tehran is the educational capital of Iran, drawing top students from across the country to its prestigious institutions.

* Literacy Rate: Tehran province boasts one of the highest literacy rates in Iran, exceeding 92% overall, and nearing 98% for the population aged 15–24. * University of Tehran: Often considered the nation's premier university (ranked highly in the Middle East and globally in engineering and sciences), functioning as the intellectual heart of the city. * Sharif University of Technology: Internationally recognized for producing top-tier engineers and computer scientists. * Amirkabir University of Technology (Tehran Polytechnic): Another leading institution for applied sciences and engineering. * Tehran University of Medical Sciences (TUMS): The highest-ranked medical university in the country. * K. N. Toosi University of Technology & Iran University of Science and Technology (IUST): Key contributors to Tehran's heavy concentration of STEM education and research.

Public utilities in Tehran are heavily subsidized and managed by state-affiliated regional companies.

* Electricity: Managed by the Tehran Regional Electric Company (TREC), a subsidiary of Tavanir. The grid operates on 220V, 50Hz. * Water: Overseen by the Tehran Province Water and Wastewater (TPWW) company. Tap water is generally safe to drink and is sourced largely from major dams in the Alborz mountains (Karaj, Latyan, and Lar). * Gas: Piped natural gas is ubiquitous, supplied by the National Iranian Gas Company (NIGC), and is the primary source for winter heating and cooking. * Waste Management: Handled by the Tehran Municipality Waste Management Organization. While daily collection is common, comprehensive municipal recycling is still developing, often supplemented by informal waste collectors. * Telecommunications: Providers like TCI (landlines), Irancell, MCI, and Rightel offer widespread 4G and 4.5G mobile coverage. Note that internet access is subject to national filtering policies.

Tehran is generally safe for both residents and tourists regarding violent crime, though its size and density require standard urban precautions.

* Emergency Numbers: Police: 110 | Ambulance: 115 | Fire: 125 * Crime: Violent crime against foreigners is rare. Petty crime, such as bag-snatching or pickpocketing, can occur in crowded areas like the Grand Bazaar or on the Metro during rush hour. * Traffic: The greatest physical hazard in Tehran is road traffic. Crossing the street can be intimidating; visitors are advised to move at a steady, predictable pace, allowing drivers to maneuver around them. * Local Laws: Visitors must adhere to national Islamic laws. This includes a strict ban on alcohol and pork, and mandatory dress codes (hijab/headscarves and loose-fitting clothing for women; long trousers for men) in all public spaces.

Nestled at the foot of the Alborz Mountains, Tehran's unique geography shapes its environmental challenges and treasures.

* Air Quality: Tehran struggles significantly with air pollution. The mountains trap vehicle emissions and industrial smog, creating severe temperature inversions in the winter. The city occasionally closes schools on highly polluted days. * Water Resources: Rapid population growth and regional droughts have put immense pressure on Tehran's water supply, leading to concerns about aquifer depletion and subsequent land subsidence in the southern plains. * Parks and Green Spaces: The municipality has heavily invested in greening the city. Tehran has over 800 parks, including the sprawling Mellat Park, Laleh Park, and the mountain-hugging Jamshidieh Park. * Protected Areas: The nearby Turghe-ye-Tehran and Central Alborz Protected Area offer sanctuaries for local wildlife, including Persian leopards, wild sheep, and eagles, while providing vital hiking and ecotourism spaces for city dwellers.

Tehran’s urban planning is focused on managing its immense population while attempting to modernize infrastructure.

* Metro Expansion: The Tehran Metro, already the largest in the Middle East, is continually expanding. Plans for Lines 8, 9, 10, and 11 are in various stages of design and construction to alleviate severe surface traffic. * Smart City Initiatives: The Tehran Municipality is digitizing services, introducing smart parking, electronic ticketing, and a unified city app (“My Tehran”) to streamline civic life. * Urban Renewal: Efforts are ongoing to retrofit historical districts and renew older, structurally vulnerable buildings in southern Tehran to mitigate earthquake risks. * Capital Relocation: Though frequently debated in parliament due to Tehran's earthquake risk, pollution, and congestion, shifting the administrative capital remains a long-term, highly theoretical project rather than an imminent reality.

Tehran is a melting pot of Iran's diverse ethnic and linguistic groups, drawing migrants from every province for economic and educational opportunities.

| Demographic Metric | Details | | :--- | :--- | | City Population | ~8.7 million (City), ~15 million (Metropolitan Area) | | Primary Language | Persian (Farsi) | | Ethnic Diversity | Persian (majority), significant populations of Azeris, Gilakis, Mazandaranis, and Kurds. | | Religion | Shia Islam (vast majority); minorities of Sunni Islam, Christianity (Armenian/Assyrian), Judaism, and Zoroastrianism. | | Age Distribution | Heavily skewed towards young adults; a legacy of Iran's 1980s baby boom, though birth rates are now declining. |

1. Tehran is situated at the foothills of the Alborz Mountains, with an elevation ranging from 1,200 meters in the south to 1,700 meters in the north.
2. It became the capital of Iran in 1786 under Agha Mohammad Khan of the Qajar dynasty.
3. The iconic Azadi Tower (Tower of Freedom) was built in 1971 to commemorate the 2,500th anniversary of the Persian Empire.
4. Milad Tower, standing at 435 meters, is the sixth-tallest telecommunication tower in the world and dominates the city skyline.
5. Valiasr Street is the longest street in the Middle East, stretching 18 kilometers and lined with ancient plane trees.
6. The Golestan Palace, a masterpiece of the Qajar era, is a designated UNESCO World Heritage site.
7. Tehran’s Grand Bazaar is a city within a city, with over 10 kilometers of labyrinthine corridors.
8. The city sits on several major fault lines, making it highly susceptible to earthquakes.
9. Tehran translates loosely to "bottom of the mountain" or "warm place," though its exact etymology is debated by historians.
10. The Treasury of National Jewels in Tehran houses the Darya-ye Noor (Sea of Light), one of the largest cut diamonds in the world.
11. The Tabiat (Nature) Bridge is an award-winning, multi-level pedestrian bridge connecting two major public parks over a busy highway.
12. Mount Tochal, just north of the city, features a telecabin (gondola lift) that takes skiers from the city limits to a ski resort at 3,740 meters.
13. Prior to the Qajar era, Tehran was a modest village known for its pomegranates, living in the shadow of the great ancient city of Rey (now a southern suburb).
14. The city hosted the 1974 Asian Games, the first time the games were held in the Middle East.
15. Tehran's Metro system is celebrated for its cleanliness, efficiency, and beautiful station architecture, some featuring local art and calligraphy.
16. Tajrish Bazaar in northern Tehran provides a cooler, more relaxed alternative to the Grand Bazaar, famous for its fresh produce and spices.
17. The city has a deep-rooted café culture, with hundreds of modern and traditional cafes acting as social hubs for the youth.
18. Darband and Darakeh are popular mountainous trails at the northern city limits, lined with terraced teahouses and kebab restaurants.
19. Tehran was a crucial location during WWII; the 1943 Tehran Conference hosted Churchill, Roosevelt, and Stalin.
20. Despite its chaotic traffic, Tehran has a surprisingly vibrant contemporary art scene, anchored by the Tehran Museum of Contemporary Art (TMoCA).

Q: What is the best time of year to visit Tehran? A: Spring (April to May) and Autumn (September to October) offer the most pleasant weather, avoiding the extreme heat of summer and the smoggy cold of winter.

Q: What currency is used? A: The official currency is the Iranian Rial (IRR), but locals universally use the "Toman" (1 Toman = 10 Rials) in daily conversation.

Q: Can I use my foreign credit cards in Tehran? A: No. Due to international sanctions, Visa and Mastercard do not work. Visitors must bring cash (Euros or USD) and exchange it, or use a local prepaid tourist debit card (like MahCard).

Q: Is the tap water safe to drink? A: Yes, Tehran's tap water is heavily purified and generally safe to drink, though some visitors prefer bottled water for taste.

Q: What is the dress code for women? A: By law, women must wear a hijab (headscarf) covering their hair, and loose-fitting clothing that covers the arms and extends to the mid-thigh (like a manteau or tunic).

Q: What is the dress code for men? A: Men should wear long trousers. T-shirts are perfectly fine, but shorts and sleeveless shirts are not permitted in public.

Q: Are there ride-hailing apps in Tehran? A: Yes. Snapp! and Tapsi are the local equivalents of Uber, and they are incredibly cheap, reliable, and available in English.

Q: Is alcohol legal? A: No. The consumption, sale, and importation of alcohol are strictly illegal in Iran.

Q: Which days form the weekend? A: The Iranian weekend is Thursday and Friday. Friday is the main day of rest, and many shops and bazaars will be closed.

Q: Do people speak English? A: While Persian (Farsi) is the official language, many young people, students, and professionals in Tehran speak conversational English.

Q: How do I get from the airport to the city? A: Imam Khomeini International Airport (IKA) is about 45km south of the city. You can take an airport taxi, book a Snapp, or use the Metro (Line 8) which connects to the city grid.

Q: Is the Metro easy to use? A: Yes, it is highly efficient, cheap, and all signage and announcements are in both Persian and English. The first and last carriages are usually women-only.

Q: What is the internet situation? A: Internet is widely available via Wi-Fi and 4G, but many global sites and apps (WhatsApp, Instagram, Facebook, YouTube) are blocked. Visitors usually install VPNs before arriving.

Q: Can I take photographs everywhere? A: Most tourist sites are fine, but strictly avoid photographing government buildings, military installations, embassies, or protests.

Q: Is Tehran safe for solo female travelers? A: Yes, Tehran is considered very safe for solo female travelers. Harassment is rare, and locals are typically incredibly hospitable and protective of tourists.

Q: What should I buy at the Grand Bazaar? A: Spices (especially saffron), pistachios, traditional Persian carpets, copperware, and turquoise jewelry.

Q: How much should I tip? A: Tipping is not as standardized as in the West. In nicer restaurants, a 10% tip is appreciated. It is common to round up taxi fares or leave small change for hotel staff.

Q: What is "Ta'arof"? A: Ta'arof is a complex Iranian system of politeness. For example, a shopkeeper might initially refuse payment. You should insist on paying; they will accept after one or two refusals.

Q: Are there vegetarian food options? A: Traditional Persian cuisine is meat-heavy, but vegetarians can find options like Kashk-e Bademjan (eggplant dip), Mirza Ghasemi, Falafel, and various salads.

Q: What kind of electrical plugs are used? A: Tehran uses standard European two-pin plugs (Type C and F) operating on a 220V supply.

Tehran Azadi Tower night photography Milad Tower Tehran skyline Golestan Palace tiles and mirrors Tehran Grand Bazaar crowded alleys Darband Tehran restaurants and river Valiasr Street plane trees Tajrish Bazaar spices and produce Tochal telecabin and snowy mountains Tabiat Bridge Tehran sunset Tehran Metro station interior architecture

Tehran walking tour 4K Tehran drone footage skyline Iranian street food tour Tehran Inside the Grand Bazaar Tehran Walking across Tabiat Bridge Tehran Tehran history and Qajar dynasty documentary Tehran traffic and street life timelapse Golestan Palace full tour Skiing in Tochal Tehran vlog How to use the Tehran Metro guide

Tehran political map districts Alborz mountains terrain map Tehran Tehran satellite view Google Maps Tehran Metro English map high resolution Valiasr Street road map Chitgar Park cycling trails map

The Social Pulse community hub for Tehran offers an array of connections for locals, expats, and diaspora alike.

* Volunteer & Charity: Connect with organizations like MAHAK to support pediatric cancer care or participate in local food distribution drives in southern Tehran. * Expat & Student Network: Join forums for international students studying at the University of Tehran, or expat boards for navigating housing and visas. * Outdoor Clubs: Find hiking groups that tackle the Tochal and Darband trails every Friday morning, or cycling groups around Chitgar Lake. * Arts & Culture: Access a shared community calendar for independent theater shows at Iranshahr Theater, gallery openings in central Tehran, and underground traditional music sessions. * Language Exchange: Connect with locals eager to practice English, French, or German in exchange for conversational Farsi (Persian) sessions at cafes around Enghelab Square. * Marketplace & Real Estate: Browse local listings for apartment rentals in districts like Shemiran, Ekbatan, or Shahrak-e Gharb, and find classifieds for furniture and vehicles. * Genealogy & Memorials: Contribute to local history archives, trace family roots back to the Qajar-era neighborhoods, or post on the 'Celebrate a Life' board to honor loved ones laid to rest in Behesht-e Zahra.

Title: Tehran, Iran | The Complete City Guide & Profile Description: Explore Tehran, the dynamic capital of Iran. Discover history, landmarks like the Azadi Tower, local culture, demographics, travel tips, and community resources. Keywords: Tehran, Teheran, Iran capital, Alborz mountains, Azadi Tower, Golestan Palace, Tehran travel, Tehran Metro, Grand Bazaar, Visit Iran Hashtags: #Tehran #Iran #VisitTehran #TehranLife #Alborz #MiddleEast Alternate spellings: Teheran, Tihran Nearby locations: Karaj, Rey, Shemiran, Damavand, Qom Categories: Capital City, Megacity, Historic Destination, Cultural Hub Tags: City Profile, Middle East Travel, Persian Culture, Expat Guide

* Statistical Center of Iran (SCI): Official demographic and census data. * Tehran Municipality: Civic infrastructure, public service, and urban planning information. * UNESCO World Heritage Center: Historical data and preservation details regarding the Golestan Palace. * University of Tehran & Sharif University of Technology: Education statistics and global academic rankings. * Visit Iran (Ministry of Cultural Heritage, Tourism and Handicrafts): Official tourism guidelines, facts, and site descriptions. * World Health Organization (WHO) / IQAir: Data regarding Tehran's air quality indices and environmental challenges. * Lonely Planet & Standard Tourism Guides: Baseline information for traveler safety, FAQ data, and cultural etiquette (Ta'arof, dress codes).