Characterized by a funnel shape, it has a diameter of 500 metres and it is 200 metres deep, with an overall surface area of 18 hectares. Everything in Su Suercone, which is also called Su Sercone or Sellone, is 'oversized': it is the largest sinkhole in Sardinia, the result of the dropping of a karst vault in the heart of the limestone plateau of the Supramonte di Orgosolo.​ It can be reached via different and long itineraries that require physical effort, adequate equipment and the support of expert guides. Crossing through the wild, unspoilt nature, between sheer rock faces, thalwegs, gorges and gullies, this is a true paradise for expert climbing enthusiasts.