Ключевые слова: aerial, ancient, archeology, artificial, attraction, cave, cavern, cehennem, collapsed, day, deep, depression, formations, geologic, geological, greek, grotto, hell, historical, hollow, inside, interior, landmark, limestone, mediterranean, mersin, mystery, myths, narlikuyu, natural, nature, none, phenomena, pit, rock, rocky, shaft, sinkholes, steep, stone, tourism, travel, turkey, underground,