The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

This ruined folly was originally built to honor a failed American state that would have become "Westsylvania."

A red sandstone freestanding monolith rises out of the sea in northern Scotland.

A 100-year-old chair with joints "cemented by nature."

Home to the "Circus" trees created by Axel Erlandson.

This massive redwood tree has a hole in the base big enough to drive through.

A trash dump made beautiful by nature's power.

One of the earliest large-scale "hyper" roofs in the U.K. is now a derelict roadside attraction.

Norway has built what may be the world's most beautiful public toilet.

A golden egg-shaped sauna in the Arctic tundra.

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

An abandoned saucer-shaped monument in the Bulgarian mountains.

Rotting dome home spotted near Chapel Hill, North Carolina.

A rare pod of derelict midcentury Futuro and Venturo houses lines a semi-abandoned beachfront resort outside Taipei.

The only known Futuro house in North Carolina sits along a stretch of desolate highway on the Outer Banks.  .

Pensacola's UFO home has withstood many hurricanes—just as the experimental 1960s design intended.

This crumbling UFO is one of only a few remaining "moveable ski chalets" of its kind.

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

The world's smallest movie theater runs on solar power—an attraction in itself.

A majestic mansion designed in Mughalai style, complete with a turquoise onion dome.

If you want to talk to the Pope you will have to stare down this surreal vision of Jesus rising from a nuclear hell.

The Vatican's secret porn-festooned bathroom was painted in erotic murals by one of the greatest artists of the Renaissance.

A modern sliver of architecture in Roma.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.