Houses are tucked between, on, and underneath giant boulders.

In paradise, feral pigs have claimed an island all to themselves.

One man's ambition created this psychedelic log home.

Outsider Art Community.

This South London cemetery holds the remains of more than 15,000 people.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

This unique structure in suburban Austin is made up entirely of other people's castaways, and constantly changing.

This beautiful natural train tunnel is said to grant the wishes of visiting lovebirds.

A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

A fifth-century temple improbably built into the side of a cliff.

Surreal riveted sea forts once protected the Kent shores from German attack.

The remains of diamond fever taken over by the desert.

A Hawaiian stairway to heaven—that you can't climb.

A beautiful geyser under environmental threat.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

This structure among the trees was the result of divine inspiration.

The abandoned Japanese amusement park once loomed as a dystopian Disneyland.

Furniture tries to escape an abandoned building in San Francisco.

The atmospheric road was never meant to be so creepy.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

Rising from the sea like a stone monster.

The first declared National Monument in the United States.

Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

Site of a former hidden treehouse in New Orleans.