Fantastically picturesque reed flute cave is the largest and most beautiful karst caves of Guilin , China. Once the site was Ocean. Natural disasters forced to leave the water , looking up at the surface of the fantastic mountains with gorges, clefts , caves and caverns . The cave is located on the southern slope of the rock reed flute . This karst cave goes back 240 meters and the first people visited it 1300 years ago. Due to the unique lighting and reflection of an underground lake impression of unreality !