Rumored to be the famed pirate's lookout tower, this historic stone structure is now just watching for tourists.

Rusting, graffiti-covered tanks litter the beach of this island, once used by the U.S. military for target practice.

The world's brightest bioluminescent bay.

On a small Puerto Rican island, banks of secret naval bunkers lie abandoned and filled with piles of office equipment.

This small primate research island is teeming with playing, fighting wild monkeys.

The world's second largest single-dish radio telescope, once used to contact E.T.

This modern monument to pagan belief looks like it was transported straight from ancient times.

Medicinal spa created with the discharge from a geothermal energy plant.

This collection of unique liquids allows visitors to wander the waters of Iceland's glaciers.

A bit of the Berlin Wall was gifted to the Icelandic capital to commemorate the 25th anniversary of German reunification.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

This volcanic cave lake is essentially hard proof that Iceland is the most magical place on Earth.

Rising from the sea like a stone monster.

A modern artist's primitive stone faces and unique rock instrument join Iceland's terrain with its history.