The ruins of an ancient mansion sits in front of and underneath a contemporary art gallery.

A collection of 11 million buttons illustrates the human toll of the Holocaust.

This tiny train shuttles passengers to one of Northern Ireland's most spectacular sights.

Crouch down, stretch tall, and be sure to flail your legs to pay homage to the Monty Python classic.

A floating cat sanctuary on an Amsterdam canal.

The only museum with its curator—and her pets—buried inside.

Part shoe store, part sociopolitical art gallery, part zoo.

This local art collective supports contemporary artists through a coveted residency program.

This tree was extinct for a thousand years before sprouting again from a 2,000-year-old seed.

The most playful of the life-sized statues that make up Singapore's "People of the River."

Banksy gives themself artistic license with this piece of London street art.

The architect of this fanciful complex called it an "oasis for humanity and nature in a sea of rational houses."

This Manchester laundromat is hiding something.

An impressive century-old, to-scale topographical map of Guatemala.

This colorful creation wasn't always a welcome part of Toronto's Moccasin Trail Park.

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

This doorless 20th-century elevator doesn't stop or slow down.

An island in the middle of a lake, in the middle of a volcano, in the middle of a bigger lake, in the middle of a bigger island, in an archipelago, in the Pacific Ocean.

This rare basalt crater lake is used to study the Moon and Mars.

This huge concrete map of Scotland was built as a thank you gift from a Polish soldier.

A remarkably well preserved tower dating all the way back to the Iron Age.

This professional clown's home is an outsider art wonderland.

This tiny 1930s Art Deco airport is a beautiful remnant of a bygone era.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.