I glance at my guide, Brian Kakuk—one of the world's foremost cave divers ... exist in pockets of liquid water deep beneath the surface of Mars or in a sea under the frozen crust of Jupiter's ...

Besides the beaches, The Crystal Caves are one of Bermuda’s most beautiful ... Check out the most stunning deep-sea sights ever discovered. Located inside the Phong Nha-Ke Bang National Park ...

This is how Antonio De Vivo, the caver of the Associazione Geografica La Venta", describes the incredible cavern "La Grotta dei Cristalli" located deep ... suits to “crystal-friendly” boots, in order ...

The caves covered in crystal formations surround a 55-foot deep lake. Today, bridges run throughout the caves allowing visitors to descend deep into the darkness and witness the magnificent beauty ...

The caves once existed above the water line, but were flooded when sea levels rose. Deep within these underwater caves are formations which can only be formed in dry caves - spectacular sculptural ...