A tribute shrine where the Space Invasion street art movement started.

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

A massively oversized measuring tape sculpture sits inside a hidden yard.

This small island, a byproduct of 19th-century canal construction, is now home to a charming Japanese garden.

The ruins of a medieval castle linked to the murderous French lord that inspired the famous legend of Bluebeard.

An atmospheric, medieval-themed book store hides in a 13th-century underground space.

This stunning French estate was so lavish that it landed its original owner in jail for the rest of his life.

One of only a handful of seaside temples in Korea, this sacred space is home to a legendary healing Buddha statue and a traffic safety prayer pagoda.

An all-female order shares an ancient culinary art with visitors at their mountaintop monastery.

This pagoda was once the central feature of a Buddhist temple that no longer exists.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

Ordinary art transforms to extraordinary thanks to locals' quirky sense of humor.

The narrowest street in Paris.

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.

Two small chapels housed inside an ancient tree.

Sacked by Vikings, blessed by William the Conqueror, dealt a fatal blow during the French Revolution—these ruins have seen it all.

This deconsecrated church has seen many uses, from a tobacco storehouse to a cinema.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

The artist and his brother are buried in a landscape straight out of a van Gogh painting.

A Gothic cathedral created from volcanic rocks.

Stare out over the lagoon and beyond from this 10th-century campanile on the island where the city of Venice began.

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

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.