Nominated for the seven world wonders. Jeita is one of the world's most beautiful cavern , at 20 km away north of Beirut. The lower caverns are visited by boat over a subterranean lake 623 meters long. A dry upper gallery can be seen on foot. After many years of exploration, Lebanese speleologists have penetrated 6,910 meters from the entry point of the grotto to the far end of the Underground River and 2,130 meters of the upper galleries.The main source of the Dog River (Nahr El Kalb) rises in this cavern.