Furniture tries to escape an abandoned building in San Francisco.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

This log cabin gallery is one man's gnarly, hand-carved tribute to his favorite trees.

Former self-sufficient mental institution now a planned community.

This "dead marsh" sits among the largest sand dunes in the world, a forest frozen in time.

Caves that can't seem to quit producing the remains of prehistoric humans.

Unexplained bald patches in the landscape grow and recede over time, as though they are somehow alive.

Home to some of the oldest hominid fossils ever found.

The world's largest impact crater is mainly eroded but still remembers the planet's violent history.

The remains of diamond fever taken over by the desert.

Mined to a depth of 240 meters with a perimeter of about 1.6 km, the largest hand-dug excavation in the world.

Largest cave system in Africa.

The original goat tower, the one that started it all.

An abandoned water park overtaken by the dunes.

Covering 37 subterranean acres, this Armillaria gallic is a famous fungus with its own festival.

This natural history collection contains the bones of a circus elephant that seem to be chasing a whale skeleton.

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

The world's oldest model village.

The biggest and deepest Cold War bunker open to the public can be found in southeast England.

One of the oldest trees in Britain may have been witness to some of the country's formative moments.

England's oldest surviving hedge maze has been confusing visitors for over 300 years.

In Twickenham sits a small whitewashed castle that inspired Mary Shelley's 'Frankenstein.'

The Egyptian-inspired last resting place of Lord Kilmorey.

Abstract dinosaur models in London.