The Jeita Grotto is a system of two interconnected limestone caves about 9 km northeast of Jounieh, carved over millions of years by the Nahr al-Kalb (Dog River). The upper cave can be walked through a lit pathway, while the lower cave — through which the river still flows — is visited by boat. Together they form one of the most spectacular cave systems in the Middle East, and one of Lebanon's top natural attractions.
The scale of the formations is remarkable: enormous stalactites and stalagmites, cathedral-like chambers, and the eerie silence of the underground river. The boat ride through the lower cave, at water level among the stone columns, is particularly memorable. The site was nominated as a candidate for the New Seven Wonders of Nature in 2011. Photography is not permitted inside the caves (to protect the formations), so the experience is one to absorb rather than document. Allow about 90 minutes for a full visit.