Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

The most metal church of all time was built in record time because of an international, pious pissing contest.

Legend says if you stick your thumb in the hole and it gets wet your wish will be granted.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

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

Abandoned railway line circling the city of Paris.

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

This demon atop the Notre-Dame de Paris looks utterly bored.

A glamorous hotel that once accommodated French resistance fighters and concentration camp survivors.

The video game-themed street art first popped up in the French city.

The final resting place of the "father of special effects."

Stripes of human ashes cover a back lawn in the most sought-after burial grounds in Paris.

The tomb of history's greatest potato promoter is surrounded by tubers.

This bridge was constructed from the rubble of the infamous Bastille.

135 bronze medallions mark a French meridian line which once rivaled the hotshot Greenwich timeline.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

France's most famous cemetery, with some of its most curious tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

The first public building in Savannah to offer air conditioning was a luxurious cinema that still operates today.

A statue honoring 44 continuous years of greeting passing ships.

This kitschy tavern is also home to rare early editions of "Treasure Island."