Jeita Grotto, located in the Nahr al-Kalb valley in Lebanon, is a compound of crystalline limestone caves that showcase millennia of natural history through their stunning geological formations. The site consists of two separate yet interconnected limestone caves spanning an overall length of nearly 9 kilometers. Discovered in the early 19th century, these caves were opened to the public in 1969. The upper grotto is known for its massive, cathedral-like chambers adorned with stalactites and stalagmites formed by the accumulation of minerals from dripping water, creating a breathtaking spectacle of natural art. The lower grotto is partially submerged, allowing visitors to explore it by boat along a clear subterranean river. This enchanting boat ride reveals more of the grotto's impressive features, including shimmering curtains of stone and monumental rock formations. The Jeita Grotto has been a finalist for the New 7 Wonders of Nature and serves as a major tourist attraction in Lebanon, contributing to the preservation and appreciation of the country's natural heritage.