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 ...

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 ...

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 ...

hiking for miles to investigate a mysterious 170-foot-deep hole. We've heard stories about a massive cave system hidden below, and as we descend, we uncover an incredible crystal discovery.

Crystal-clear droplets break on my shoulders ... standing directly underneath the mouth of Fern Grotto Beach’s sea cave. The cave is carved into the beach’s sandstone cliffs, just below ...

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 deep sea, outer space, and caves: Those are the only frontiers left,” says Coons, who does his exploring in a lightweight helmet with a small flashlight duct-taped to the brim.