The Supramonte is a mountainous complex characterised by carbonatic highlands and dolines. With an area of around 35,000 hectares, it also takes in the long stretch of coastline of the Golfo di Orosei and it falls within in the territorial areas of the municipalities of Oliena, Orgosolo, Urzulei, Dorgali and Baunei. Enormous rocky bastions characterise the landscape, alternating with deep canyons and rocky peaks that tower into the sky.
The Supramonte, for ease, is divided according to the territories of the municipal areas in which it falls.
The Supramonte of Urzulei constitutes the wildest part of the whole mountainous chain. The water that cuts its way among the mountains with its strength offers remarkable panoramic views and contributes to making the rich territory of tall verdant brush with bushy bushes and rare junipers. The fauna is rich in mouflon, wild boars, martens and dormice. A much aspired to destination of excursionists in this part of the Supramonte is the Codula di Luna: without overly large drops, it goes softly down towards large walls that house coloured oleanders.
The subsoil is rich in caves. The most well known is that of Su Palu, over 35 km long, that constitutes one of the longest ipogean extensions in Europe.