Desierto de los Leones (Desert of the Lions) National Park is located entirely within the limits of the Federal District, it stretches between Cuajimalpa and Álvaro Obregón boroughs. It is located in the Sierra de las Cruces mountain range west of the city center with an area of 1,867 hectares, representing fifteen percent of the entire Valley of Mexico. The area was used as a retreat for a religious group, thus the name Desierto (Desert) means not "arid place", but not populated.