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10 Civilizations That Disappeared Under Mysterious Circumstances- The Maya, Indus Valley Civilization, Easter Island, Catalhoyuk, Cahokia, Gobekli Tepe, Angkor, The Turquoise Mountain, Niya, Nabta Playa

2012 Top 100 Readers' Choice Awards

into the blue :: Cenote diving, Peninsula de Yucatan, Mexico, i was here two years ago! great place to visit , DIDNT SEE THIS CAVE THOUGH, BEAUTIFUL! RCL