Madrid is not a coastal city, but waterways play a crucial role in its geography and recreation.
* **Manzanares River:** The primary river flowing through the city. While historically modest in size, the revitalization of its banks into the *Madrid Río* park has made it a central recreational corridor. * **Lakes and Reservoirs:** The Community of Madrid relies on a network of reservoirs (*embalses*) in the surrounding mountains for its high-quality drinking water. Reservoirs like El Atazar, San Juan (where swimming and motorboating are permitted), and Valmayor are popular weekend destinations for water sports and picnicking. * **Retiro Estanque:** The large artificial pond in El Retiro Park is a beloved urban water feature, watched over by the monumental monument to King Alfonso XII.