The Jeita Grotto, a system of two separate, but interconnected, karstic limestone caves which have formed over millions of years, is the longest cave complex in the Middle East. It is located 300 metres above sea level and has a height difference of 305 metres. The Jeita upper cave has an overall length of 2,130 metres and contains a great concentration of a variety of crystallized formations such as stalactites, stalagmites, columns, mushrooms, ponds, curtains and draperies. The lower gallery which has an overall length of 6,200 metres is located 60 metres below the upper gallery. It is traversed by a smooth underwater river and a lake.