Jeita Grotto is the longest cave in the Middle East. It is situated approximately 11 miles (18km) north of Beirut. This grotto is made up of two limestone caves, upper galleries and a lower cave through which a 6230 m long river runs. Jeita Grotto consists of two separate, but interconnected, limestone caves, and boasts a length of 5.6 miles (9km). The caves were initially known as the Grottoes of Nahr al-Kalb, after the underground river that runs through the grottoes. Several names were subsequently used, including Djaita, Jehita, and finally, Jeita. Here are 48 stunning photos of this natural beauty.