Water naturally defines Ohio's borders and has played a crucial role in its industrial and cultural development.
* **Lake Erie:** Forming the state's northern border, this Great Lake is vital for commerce, recreation, and island tourism (such as Put-in-Bay and Kelleys Island). * **The Ohio River:** Bordering the state to the south and east, this massive waterway has been a historic artery for trade and transportation. * **Major Inland Rivers:** * *Cuyahoga River:* Famous for catching fire in 1969, which helped spark the creation of the EPA, it is now a clean, vibrant river used for recreation. * *Scioto River:* Runs directly through downtown Columbus. * *Maumee River:* Flows into Lake Erie at Toledo. * *Great Miami River:* Serves the Dayton region. * **Lakes and Reservoirs:** Grand Lake St. Marys, Indian Lake, and Alum Creek Reservoir are popular inland destinations for boating and fishing.