The vast chamber inside this abandoned cooling tower looks like something out of a sci-fi dystopia.

An early 20th-century sanatorium, long abandoned and now being reclaimed by nature.

A whimsical bridge uses saxophones to pay tribute to two great men and the European Union.

This bike path traverses the treetops.

Potato-peeling mannequins, Inca art, and a dangling tuber mobile help trace the history of fries at this Belgian museum.

A fantastical bed and breakfast with magically unique rooms.

Brussels' favorite peeing boy has a sister.

This bike path was sunk below water level for maximum wonder.

Sculpture designed by Turkish artist and professor Mehmet Ali Uysal.

A Belgian self-built tower inspired by the Bible and ancient civilizations.

Hiding the longest subterranean river known in the world.

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

This natural crater along the coast of Jersey may take its name from the devil statues who have watched over it.

The haunting concrete remains of a Nazi pebble crusher can still be found in this small French commune.

An art world insider finds himself battling for his artistic home.

His "Lionheart" is entombed separately from the rest of his body.

The tiny Belgian town's ancient version of Mardi Gras involves eerie wax masks, sticks for warding off evil, and ostrich plume hats.

Home to the "Rat King" of Nantes and other wonders of the natural world.

Supposed home of the camel ridden by Napoleon during his Egyptian campaign.

This crack in France's seaside cliffs once hid a sinister secret.

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

Underground hospital complex constructed by slave laborers during the German occupation of the Channel Islands.

This tiny hotel perched atop a 50-foot tower really puts things into perspective.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.