A desert island with both a buried treasure and a famous castaway.

A chance to sleep among the firs and pines of the Oregon forest.

Treehouse motel and treehouse-building school.

A rugged lava field dotted with molds of the ancient pines that were growing when the volcano erupted.

This lake in the Cascades lives up to its name, disappearing down a hole every spring.

The extensive collection of an amateur naturalist.

Largest collection of mounted dinosaur specimens in the world.

19th century pendulum and a clock restored by a rogue group of guerilla artists.

Not one, not two, but three natural bridges remain in this captivating spot post-sinkhole.

These abandoned vessels are destined to be reclaimed by the forest.

These towering cliffs jut dramatically from the middle of a barren desert.

The picturesque remains of an abandoned silver mine slope down to Tagish Lake in the Yukon.

A surprisingly beautiful abandoned World War II military base in East Greenland.

One of the largest single-span stone-arch bridges in the Balkans looks like something straight out of a fairytale.

Once considered a marvel of engineering, there are now doubts about the structural integrity of this 5.4-mile cable-stayed bridge.

The world-record holder for the longest bridge stretching continuously over water.

This whimsical garbage disposal facility receives around 12,000 accidental tourists each year.

Unknown to many, this sparkling turquoise lake hides amid Oregon's snowcapped mountains.

The hometown of a beloved manga artist created a treasure hunt for his popular ghostly characters.

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.

These hellish-looking cliffs in the Canadian Arctic have been burning for centuries.

A King Kong-like gorilla hangs from the top of this commercial building in Tokyo.

A small alleyway lined with locally drawn scenes of nostalgic anime and cartoon characters.

Alaska Natives have lived on this tiny isolated island in the Bering Strait for over 5,000 years.