A World War II gun battery sits at the easternmost point of North America.

The first transatlantic wireless signal was received at this 17th-century fort.

Dedicated to the deadliest aviation accidents on Canadian soil.

A rare cluster of alien-like plants grows along a dusty highway.

The remains of diamond fever taken over by the desert.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

This Parisian café sticks almost exclusively to an ethos of reuse.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

This abandoned Slovenian military barracks has become a punky-political art squat.

This "floating railway" is one of the world's oldest monorail systems.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

The fairy tale castle of the "fairy-tale king."

A rare pod of derelict midcentury Futuro and Venturo houses lines a semi-abandoned beachfront resort outside Taipei.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

A unique tribute to the millions of animals who served and died for the British military.

A miniature train-ride through Slovenia's largest cave system.

This one-time health resort was used by aristocrats around the world.

This massive subterranean fissure is known as the "underground Grand Canyon."

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

This small Slovenian town has become a magnet for microbreweries.

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

Obelisks and stone pineapples in the Irish countryside.

This Irish show cave is said to have been the site of a Viking massacre that claimed 1,000 lives.