Its Gologone in Barbagia, at the foot of Monte Uddè, is located a few kilometers (about 15) from Oliena and the splendid nuragic village of Tiscali.

It is a natural spring, probably the first known from Sardinia, which over the millennia has dug into the heart of the Supramonte creating an emerald lake nestled between walls of dolomitic rock and rigorous Mediterranean scrub.

The cleanliness and depth sounded an irresistible challenge reserved for speleos divers who came from the world: in 2010 Alberto Cavedon had capsized but at 135 meters.

Recognized as a natural monument since 1998, it is now only possible to see it without being able to see it all, but the wonder of nature is absolutely worth a visit.