In the northwest of the province of Santa Cruz ,220 km from the locality of "Gobernador Gregores", the National park "Perito Moreno" was created in order to protect forests of lengas, two interesting lacustrine systems that include glaciers, waterfalls, a portion of the Patagonian steppe, fossil remains and a rich autochthonous fauna.

It is composed by a mountainous region cut by valleys that overcome 900 m over the sea level,a series of hills and mountains arranged from east to west, and eight lakes that splash this National Park. As for the flora there are three delimited sectors: the steppe, represented by coironales; a zone of transition with squat vegetation due to the inclemency of the wind, composed by ñires and lengas and the forest constituted almost exclusively by lengas that are located in the coastal zones of the lakes Nasen and Azara.

They live in the park a great quantity of "guanacos" that go around the zone in groups; their predators are the puma and the red and gray fox. There are also "choiques",or "ñandu petiso", the "chinchillón" and the "huemul". In the surrounding lagoons you can view flamencos , hualas, black necked swans, "vapor" ducks, chorlos, condors and eagles. As for fish there are only autochthonous species since the salmónidos have not been introduced.

The park has also great archaeological importance. In the hill "Casa de piedra" there are seven caverns and two sectors that exhibit "pinturas rupestres", testimonies of the customs and the credence of our forefathers.