The remains of Crystal Palace Great Exhibition of 1851.

Sweden's southernmost point is located in this charming fishing village.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

This abandoned villa of makeshift buildings was once the home of dancer Elis Sinistö.

Amalfi's pre-industrial history is slowly being engulfed by the lush vegetation of the Ferriere Valley.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

An oil drilling mistake created this fountain that has been spraying water for over 150 years.

Steam engines and conveyor belts are remnants of a genius system left in the middle of the Maine woods.

This 29-ton granite ball spins around at the slightest touch thanks to a scientific phenomenon.

An unusual bed & breakfast made of papercrete.

This quirky outpost and gallery inside a former church is an unexpected trove of handcrafted art.

Mysterious glowing orbs float through the desert night.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

A small village in two different countries.

A quiet country churchyard holds a monument to the last known sin-eater in England.

The world’s tallest outdoor lift stretches along the stone pillars that inspired the floating mountains in the movie “Avatar.”

The last occupied troglodyte dwellings in England weren't abandoned until the 1960s.

This unassuming North Austin neighborhood was built to test the novel idea of home air conditioning.

A stranded woman lived alone on this remote island for 18 years, inspiring the great children's novel "Island of the Blue Dolphins."

An architect transformed this abandoned cement factory into his castle-like workshop.

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

A unique museum dedicated to culture and artistry of carpet weaving.

One of the most valuable palace-garden complexes in the eastern borderlands—and one of the most haunted.

The oldest residential street in Europe also features an optical illusion.