Reed Flute Cave is located in Guilin, China. It was discovered during the Tang Dynasty, about 1300 years ago....

Legend says that many years ago the cave was inhabited by a tribe. It is located in England....

This underground lake is located near Macan Che, on the Yukatan Peninsula. It is one of many lakes considered by locals to be a gift from Mayans God and therefore is considered to be sacred....

This underground lake is located in Mellisani,  close to Kefalonia. It was discovered when a cave roof collapsed as a result of an earthquake in 1953. The cave is full of blue water surging underground miraculously....

Lechuguilla Cave is located in the National Park, New Mexico. It is the 5th largest in the world (among those discovered yet), measuring 193 km long and 489 feet deep, making it the largest cave in the Americas....

Stalactites decorate the ceilings of Luray, water reflection making the picture seem perfect....

   Cheddar Gorge is the largest canyon in England. Here there has been found the oldest complete human skeleton  from UK in 1903. Known as "Cheddar Man" skeleton was estimated to be 9,000 years old....

   Hamilton pool, as it is called, is located in Austin, Texas. It was created naturally when a dome of underground caves collapsed making this wonderful pool. Today visitors come here on a daily basis....