The site where a nuclear bomb was lowered over 8,000 feet underground and detonated as an experiment in natural gas extraction.

The birthplace of both the Atomic Age and Godzilla, and the namesake of the bathing suit.

"Not too many people can say they've had a nuclear bomb dropped on them, not too many would want to." — Walter Gregg.

An enormous concrete structure built over a nuclear crater.

The largest man-made crater in the U.S. marks the spot where we once tested mining with nukes.

An underground world of gorgeous, palatial metro stations designed as a nuclear shelter complex.

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

In 2018, Pohoiki Road was severed by lava flowing from the eruption of Kilauea.

This lesser-known geographic marker was the reference point for all surveys of the continent for 75 years.

In the middle of a New England forest sit the crumbling ruins of World War II-era ammunition storage bunkers.

Once the extravagant escape of the Ford family, this enigmatic ruin now stands as a haunting reminder of its former glory.

A roadside statue store in rural Minnesota with quirky displays.

The 10-foot-wide Long Beach home was built on a dare.

The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

The watery grave of an impractical idea.

When in Idaho, sleep in a giant potato.

This bomb shelter-themed bar has barely changed since it opened.

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

Made famous by "Star Wars," these troglodyte homes face an uncertain future.

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

No one's quite sure why there's a metal megaphone bolted on two rocks in the middle of the Mojave Desert.

A former barn converted into a massive train diorama.

The location where the iconic movie character declared it was time to go home.

The first marker along the famous boundary.