

Granite and gneiss are the main rocks in the Infernos gorge.
We reach the highest points at 2.281 m, in the place called Cuerda de los Infiernillos and 2.290 m at Cerro del Estecillo, that surround the Serrá gorge, it was an old glacier valley that was shaped by quaternary ice.
The hydrographic net stands out in this natural reserve where waterfalls and streams flow, water is the key element even in dry areas it is felt.

Nevertheless, one of the best well-known places in the gorge is Los Pilones, in this area rocks were shaped by fluvial erosion that caused the formation of puddles inside the rocks.

Due to the wide altitude, from 300 to 2000 metres, there are different varieties of herbs, bushes or trees placed in deciduous forests, banks, mountainous pines and alpine pastures.
Chestnut trees stand out in the decidious forests, and the population of the region take advantage of its wood, as well as the delicious chestnuts.
Due to the multiple ecosystems in the natural reserve there is a wide variety of animals such as royal eagles, tawny vultures, peregrine falcons or mountain goats. From the top of the valley descending to the lower pastures a great amount of animals have adapted to this wide variety of habitats.
