Los Nevados National Natural Park is a national park located in the Cordillera Central of the Colombian Andes. The 5,300-meter high volcano Nevado del Ruiz is dominating Los Nevados. Out of the 55 protected areas in Colombia, Los Nevados National Natural Park was the third most visited in 2009, with 50,045 visitors. The most visited was the Rosario and San Bernardo Corals National Natural Park followed by the Tayrona National Natural Park. In addition to Nevado del Ruiz, seven other volcanoes are located in the area, Nevado Del Tolima, Santa Isabel, Nevado del Quindío, Páramo de Santa Rosa, Cerro Bravo, Cerro Machín and Nevado El Cisne.
Glacial activity has shaped the landscape 3,000 metres (9,800 ft) above mean sea level, leaving U-shaped valleys and moraines behind. Extrusive igneous rock are dominant above 3,500 m (11,500 ft) on the eastern slope and 2,200 m (7,200 ft) on the western slope. The Otún Lake, lying in extinct volcano crater, and Green Lake are located in the area. The park's hydrographic networks supply water to over 2,000,000 coffee-growers in the region, and to most of the rice and cotton crops in the Tolima Department.