Nahuelbuta (Mapuche for "big tiger") is a sanctuary for monkey puzzle trees, with specimens dating back 2,000 years.

[1] In addition to monkey puzzle trees, the park is also home to coigüe, ñirre, oak, lenga, orchids, carnivorous plants.

[2] The park provides habitat for the mountain lion, the pudú, a small Chilean deer, and Darwin's fox.

The National Forest Corporation (Chile) information center and camping area are both found in Pehuenco, where the most popular route begins, ending at Cerro Piedra del Águila (1,379 meters).

There are 10 camping sites here, with picnic tables, fire areas, rustic toilets and water.