The Jeita Grotto of Lebanon is a compound of crystallized caves located 20 km north of Beirut, Lebanon in the Valley of Nahr al-Kalb or Dog River. This grotto complex is composed of two caves – the upper galleries and lower cave. The upper galleries was discovered in 1958 by Lebanese speleologists, while the lower cave where an underground 6230-meters-long river runs was discovered in 1863 by Reverend William Thomson. The grotto complex was nominated in the New Seven Wonders of the World.

The cave and galleries is home to one of the biggest stalactites in the world hanging 8,20 meters from the ceiling. Carved from the limestone by water are cathedral-like vaults with various sizes, colors and shapes. The cave is more than 9000 meters in length and 108 meters in height from the ceiling to the water level.