The Marble Caves sit on the shores of a turquoise glacial lake in southern Chile. Light bounces off the water onto the walls, ...

These caves show evidence of a change in sea levels that took place thousands of years ago. The caves once existed above the water line, but were flooded when sea levels rose. Deep within these ...

At 4,025ft (1227m) above sea level and overlooking a deep valley ... suspect is a fossil of a shark tooth embedded in a rock. "The cave," he says, "holds many secrets." Krem Puri is an incredibly ...