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

Colorful Native American paintings are hidden within this small cavern.

Smooth basaltic rocks tell a tale of ancient glacial waterfalls.

The fossilized remains of ancient California redwoods.

Massive prehistoric mammals used these stones as oversized scratching posts.

An extensive collection of ancient Egyptian artifacts and mummies.

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

A mountain range on an active U.S. Navy base hides thousands of mysterious prehistoric rock carvings.

A toxic ghost town sitting atop a massive coal fire.

The only geyser in the state of Pennsylvania is caused by pressure from an abandoned coal mine outside of the ghost town Centralia.

A unique Shinto shrine filled with bunnies and wordplay.

Europe's official "zero-level," the equator of elevation.

One of the world's few mounted blue whales, its jaws are hinged open allowing visitors to descend into a lounge.

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

Natural time capsule containing an alien ecosystem.

This 1830s store is believed to be the site of Harriet Tubman's first stand.

The oldest U.S. Government building in California, and it's State Historic Landmark #1.

This French colonial post office is arguably the grandest in all of Southeast Asia.

This 5-by-6-foot wooden hut is the smallest historic post office in the U.S.

The smallest post office in the United States is no bigger than a broom closet.

This modest post office sits on the site of H.H. Holmes' famous murder castle.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

Far from the shore, this sandy victim of the Skeleton Coast looks like it was plopped in the middle of the desert.

Happy harbor seals frolic and snooze on this warm, sandy stretch of coast.