Nikola Tesla's former home contains an homage hidden from plain sight.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

A mud statue stands in the dark tunnels, seeming to hold up the weight of the city above.

A French artist's vague warning hangs over Belleville.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

This museum houses an imposing skeleton army comprised of creatures great and small.

Behind the pink curtain, Au Bonheur du Jour, an art gallery of erotic archives.

This magical space partly designed by Antoni Gaudi is one of the best examples of romantic gardening in the Mediterranean.

A huge enchanting public park just outside the ancient walls of Rome.

A breathtaking bridge that crosses a vast gorge over a river's torrents, and has a tale of a devil architect attached.

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

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

This faux-seedy Japanese arcade is made up to look like a maze of alleys straight out of a cyberpunk dystopia.

A Catholicism-themed restaurant where sacrilege is on the menu.

A taste of the macabre Tokyo's ritzy shopping district.

A museum of magic with a Sadist past.

Perhaps the most beautiful of preserved saints, with a little help from Paris.

Science fiction's grandfather has a fittingly marvelous tomb.

In the best of all possible worlds, everyone will get a chance to see this statue in which Voltaire's heart is interred.

A medieval village holds a very modern hotel.

Bold black and white motifs of life and death add a dramatic flair to this 17th-century crypt.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

Of course Salvador Dalí lived in a castle...

The final resting place of the great navigator, or maybe his brother.