The ruins of an abandoned cemetery are among the last remnants of the old village of La Boulaye before a wealthy landowner had it relocated.

Longest canal tunnel in the world, abandoned in the 1960s.

The sunken structure looks like the victim of a catastrophic flood.

A massive, secret marina for the Nazis' most formidable weapon in the Atlantic.

This crumbling, graffiti-covered mansion sits tantalizingly within reach of the proletariat who frequent a public park.

This is what trains will look like after the zombie apocalypse.

Hundreds of dwarf beeches create an unusual, haunting forest in the north of France.

An ancient monastery, a locked room, and a mysterious book heist.

This natural French spring has been turned into a magical grotto by Roman and medieval constructions.

This huge metal monument is slowly being stripped to its concrete skeleton.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

This Belgian theme park began as a refuge for bored church children and was closed down when a boy lost an arm.

What was once a bustling mining installation is now a bustling hub of contemporary art.

A Cold War command center is hidden under an idyllic countryside.

This abandoned Belgian fortress is purposefully being left to nature.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

Each year melting snow turns these Austrian hiking trails into scuba zones.

Swarovski's museum/theme park is a fake diamond fantasia overlooked by a giant.

Kenyan restaurant is a carnivore's paradise, serving exotic meats at its ultimate 'Beast of a Feast.'

Just outside of Nairobi lies a large estate surrounded by endangered Rothschild giraffes, who have been fed from the window by Mick Jagger and Walter Cronkite.

An underwater road considered a possible Atlantis location.

The world's only underwater laboratory where "aquanauts" study oceanic life.

You may get stranded and everyone's peeing in the water, but at least there's cocktails!