The largest crypt ever constructed in France was built in the 11th century on an ancient Druid sacred site.

The smallest restaurant in the world.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

A charming Spanish village sits atop this natural limestone overpass.

A competition inspired by Stephen King's psychological horror novel "The Long Walk."

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

A sandstone block marks the alleged spot where the legendary writer was conceived.

This fairytale-like structure is the last turf church ever constructed in Iceland.

Just a man taking his prehistoric pet for a stroll.

A registered historic landmark shrouded in unsettling local legends.

A historic hill of tall tales, with one rather special tree.

Suffocating dogs was a common spectacle in the fumes of this noxious cave.

Scotland's only funicular railway is also the United Kingdom's highest.

Hot springs monkey spa in the middle of Hell's Valley.

Rippling sand dunes frozen in the Arizona rock.

An exquisite tunnel of cascading flowers.

The world’s largest underground marble quarry is hiding in Vermont.

Salt is slowly eating away this abandoned saltworks town in the desert.

The only thing stranger than stumbling onto these philosophical musings is the story of the homesteader who created them.

This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.

One of the largest Native American shell middens stands 30 feet tall.

Follow the original medieval paths that wind through this intriguing section of the city.

At high tide this strange footbridge appears to have no purpose whatsoever.