The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

A 19th-century subterranean reservoir repurposed as a contemporary art cave.

A walkable map of the world, made from soil and stone by one man.

Vortex-shaped aquarium hosts Europe's largest school of piranhas and other ocean creatures.

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

Survival capsules find a second life as a unique hotel.

A seven-century-old jail tells a not-so-pleasant history of crime and punishment.

Incredible labyrinth of man made caves.

Hidden within a Netherlands crater is a stone bed that lets those who lie in it see the sky as a curved surface.

Cat art as far as the eye can see.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

The abandoned medieval theme park was meant to be the "Disneyland of the Philippines."

A small museum dedicated to the whimsical tool that turns sugar cookies into works of art.

The ruins of this prominent glass factory yield hidden treasures buried among the jungle floor.

This Birdsill Holly fire hydrant is the remnant of a very different type of hydration innovation.

On the side of Arkansas' Great River Road stand the remains of a forgotten World War II POW Camp.

A meow-velous tribute to a beloved street cat, made famous on the internet.

The remains of a doomed Antarctic plane, buried beneath layers of ice and snow, await those willing to do a bit of digging.

A beautiful waterway tucked in the corner of a power plant.

The grounds of this Jacobean estate contain one of the oldest mulberry trees in England.

This enormous storm barrier is one of the largest moving structures on Earth, with each arm taller than the Washington Monument.

The Netherlands is home to a bridge printed out of reinforced concrete.

Every year locals give the bear a fresh coat of paint to preserve its signature goofy grin.

Science meets wall art to highlight the beauty of famous mathematical equations.