the source of gorgazzo, in polcenigo, is a underwater cave where the homonymous torrent originates,

livenza tributary torrent underwater cave source landscape travel touristic italy tourism tree italian channel river scuba emerald turquoise berylls lapislazzoli water pure friuli venezia giulia explored depth gushing paradise lagoon clear nature natural exploration deepest world speleonaut diver hydrogeological origin cloudy rain winter springs deep sub pond polcenigo pordenone gorgazzo