It is also home to the Grutas of Carlos Pacheco, a smaller system, as well as two subterranean rivers which have carved out tunnels in the rock.

[2] The park has outdoor pursuit attractions such as rappelling, and rock climbing in Limontitla Canyon.

[3] The park is located in the Sierra Madre del Sur mountains, primarily in the northeast part of the state of Guerrero.

This section of the Sierra Madre del Sur is made of rock, mostly limestone, that was formed under oceans millions of years ago.

[4] The parks extends over 2,700 hectares of land,[5] and is located southwest of Mexico City, near the silversmithing town of Taxco.

[4][6] The park is visited by about 350,000 people annually, generating an income of about 8 million pesos each year.

[8] Most of these salons are located under the Cerro de la Corona, a limestone mountain ridge.

[6] The publicly-open portion is essentially a two-km-long, level passage of linked “salons” or borehole openings.

It is rented out for events,[2] and has been the site for a number of concerts including one in 2007 by Miguel Bosé[9] and one by the Acapulco Philharmonic Orchestra in 2009.

[3] On the walkway to the entrance there are a couple of amate trees (Ficus insipida) with their roots wound around the rocky walls of Limontitla Canyon.

The first scientific expedition to the caves was organized by the Secretary of the French Legation in 1935,[6] and the national park was established in 1936 by President Lázaro Cárdenas.

[3] They were named after Mexican General Carlos Pacheco, who fought against the French Intervention in Mexico.

However, after this point, the river descends steeply and those not in good physical condition are not advised to continue.

[2] The park also has a large swimming pool located in a point that overlooks the place where the San Jeronimo and Chontalcoatlán Rivers meet to form the Amacuazac.