Jeita Grotto. One of the world’s most beautiful caverns can be found about 20km north of Beirut. The lower caverns are visited by boat over a subterranean lake 623 meters long, while a dry upper gallery can be seen on foot.

After many years of exploring, Lebanese speleologists have penetrated 6910 meters from entry point of the grotto to the far end of the Underground River and 2130 meters of the upper galleries. The main source of the Dog River (Nahr el Kalb) rises in this cavern.