El Leoncito National Park

Centro Astronómico and Andes Mountain range

Location: is located in the southwest of San Juan province, in the Calingasta Department.

Surface: It has a 76.000 hectares surface, and protects historic and paleontological sites (a part of the “Inca´s way” is included).

Created: It was created as a Strict Reserve in 1994 in order to protect representative samples of the “puneño” and “altoandino” scrublands. In 2002 the protected area became a National Park.

Plants: retamo, jarilla,bobales, cortaderas, tolilla, ajenjo, pastizales de coirón.

Animals: guanacos, chinchillón, lizards, mora eagle, aguilucho común and peregrine halcyon (the fastest bird in the planet).


Characteristics: PN El Leoncito (El Leoncito National Park) is an excellent place for observating stars, due its atmospheric qualities.

With the protected area creation, possible pollutants effects are avoided. The protected area atmospheric qualities are guaranteed.

PN El Leoncito (El Leoncito National Park) is an excellent place for observating stars, due its atmospheric qualities. There are two astronomical observatories: “El Leoncito astronomical complex” (CASLEO) -which constitutes one of the best centers of Argentina-, and the “ Dr. Carlos U. Cesco astronomical observatory”.

Casleo: Complejo Astronómico El Leoncito

Argentina National Parks

San Juan Province