The historic myths and legends of the spring that hides beneath Oliena's

Su Gologone is a karst spring located in the Supramonte range northeast of Oliena, in the province of Nuoro, Sardinia, Italy. The spring is hidden in a cave beneath the mountain range, and is considered to be one of the most important sources of fresh water in Sardinia, with an average flow rate of 500 liters per second. The water comes out of a crack in the limestone rock, which goes underground to a depth currently explored by speleologists of 135 meters (443 feet). The grotte di Sa Oche e Su Ventu, in the Lanaitho valley, and the caves of S’Edera, Su Colostrargiu, S’Eni and Istettai form a cave system which is one of the biggest in Italy. They are not connected (at least until now), but they all belong to the hydrological system of the Sorgenti Su Gologone. Remnants of ancient civilizations have been found near the spring, leading to various myths and legends surrounding its origin.

Sources: Wikipedia, Wikidata, Wikimedia Commons