This museum glorifies the humble potato.

A popular rock that acted as a waymarker for American pioneers.

One of the first intercontinental ballistic missile sites in the United States.

This jagged colossus of a building is mostly held together by an enormous concrete exoskeleton.

A castle that was built stone by stone by an eccentric journalist.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

This enormous World War II relic is one of the largest wooden structures in the world.

A hyper-luxurious, 12,000- square foot home might be buried beneath Queens, still waiting to protect you from nuclear missiles.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

Curious cave that stays a cool 56 degrees all year long.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

A sobering scientific reminder of the human damage caused by the advent of the nuclear age.

This museum inside a museum tells the story of London's timepieces.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

A clock designed to run with perfect accuracy for 10,000 years.

Medical history with an amazing, if frighting, collection of wax diseases on display.