A museum of carnival attractions where you are invited to ride the rides.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

This crucial gathering spot along the "hippie trail" still displays old notes between traveling beatniks and backpackers.

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

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

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

This museum was invented in a novel before being made real by the author.

Turkish adventurer antiques in the heart of the Grand Bazaar.

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

The secret wartime bunker built on the platforms of an abandoned Tube station.

Artists and musicians now rule over this former rail station.

Giant, friendly pelicans in Central London, the most unlikely of places.

An artistic tribute to the famous singer, just around the corner from where he was born.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

A series of abstract, silly sculptures represent the works of a great modern classical composer.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

This short pedestrian span is also known as the "Fairy Walking Bridge" because it looks almost magical.

Rivers of cattle blood gone, a strange Escheresque building remains, the last of its kind.

A part of the world's largest marsh seems to be growing bright red Martian grass.

One of Ireland's most infamous prisons for rebels including men, women and children.

A museum that cashes in on its infamous little people while teaching you a thing or two about the Irish fey.