The Lower Grotto of the Jeita Grotto is a system of limestone caves situated in the Valley of Nahr al-Kalb (Dog River), 20 kilometers north of the Lebanese capital Beirut. This stunning natural wonder features two separate but interconnected caves: the upper galleries and the lower grotto, with the latter being partially submerged. Visitors to the Lower Grotto can enjoy a magical boat ride on a subterranean lake that extends over 7.5 kilometers, making it one of the longest cave rivers in the world. This portion of the grottos showcases a variety of stalactites and stalagmites, creating an almost otherworldly landscape. The grottos were discovered in the 19th century and have since been a focal point for speleologists and tourists alike. The Jeita Grotto is a candidate for the New 7 Wonders of Nature and serves as a major cultural, touristic, and ecological site. The complex is carefully preserved due to its significant geological formation and contribution to Lebanon's fresh water supply.