On the Oregon coast there is a natural hole that seems to be draining the sea.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

An exquisite tunnel of cascading flowers.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

On Japan's Tashirojima Island, cats are king.

An abandoned theme park with a strange and tumultuous past.

A factory director designed what was the world's longest suspension footbridge in 1923 so his employees could get to work safely.

This Luxembourg cave is covered in cryptic looking marks left by mining activity.

A wonderfully kitsch bookstore the size of a supermarket.

An amusement park on the grounds of an unused nuclear power plant, with a swing ride inside the cooling tower.

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.

This abandoned Belgian fortress is purposefully being left to nature.

An industrial relic is now one of Europe's most staggering art spaces.

This former steel and coal plant is now a neon-lit industrial fantasia.

No need to strap in for a "ride" on this walkable roller coaster.

This "floating railway" is one of the world's oldest monorail systems.

An abandoned underground bathroom is now a space for public art.