This massive mural by famed pop-artist Keith Haring was hidden for almost 30 years until its 2018 rediscovery.

A public urinal so pretty, it was declared a national monument.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

This unusual elevator doesn’t stop or slow down.

Sail in for a ’dam good slice.

This museum inside Amsterdam's largest cemetery explores how people deal with death.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

This cemetery overlooking the Benbulben rock formation is the final resting place of one of Ireland's most beloved poets.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.

Cave shrine on Monte Pellegrino.

Step into Narnia at this small park featuring statues from "The Lion, the Witch, and the Wardrobe."

Certain traditions prevail on the least-visited island of the Aran Islands.

A modern-day Lascaux cave underneath Paris.

This lesser-known Frank Gehry building houses a treasure trove of cinema history.

An unusual number plate signifies the building's saucy past.

An odd museum dedicated to French fakes.

The oldest and smallest cemetery in Paris is only open to the public twice a year.

An iconic and eccentric bar for "Manouche" Jazz music keeps expanding its space—and its influence.

Two awe-inspiring globes from the reign of the Sun King hang from the ceiling of France's national library.

Natural history museum celebrating biodiversity with a parade of taxidermy animals.

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