The world's largest military aircraft cemetery.

A colony of Mexican free-tailed bats live under the bridge and take flight at sundown all summer long.

During World War II this was the site of an "honor camp" used as a prison for draft dodgers, Native American conscientious objectors, and Japanese-Americans—including a man who brought his case against the camp to the Supreme Court.

Giant telescope mirrors built in a spinning furnace under a college football stadium.

This quiet chapel was central to a community of settlers who reclaimed an abandoned fort.

An amazing collection of model trains, collectibles, and artifacts that span the last 100 years.

A cabinet of curious mathematical models and old calculators.

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

The remains of this rugged homestead ranch offer a brief glimpse into a bygone era.

Sleep where gangsters fell amidst smoke and flame, with nary a bullethole to show for the legendary struggle.

From working out of his garage to the James Beard semifinals, one Tucson baker has kept his fan base—and his grains—local.

A natural history wunderkammer in the middle of the desert.

This southwestern historic site was designed and built by an artist who wanted his work to "feel at home."

Miniature art that tells an enormous story.

The Magical World of George Phar Legler.

An Arizona museum with a collection of pharmaceutical oddities, including a jar of a gangster's chewed gum.

Part of a secret 1970s nuclear defense program is now open to the public.

The only remaining Cold War–era Minuteman II missile control center in Missouri.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

These former Cold War launch sites have been preserved for tourists to see where the button might have been pushed.

The final resting place of the world's first nuclear reactor.

The secret city built by the Manhattan Project.

The site of an underground detonation of a megaton nuclear bomb in the middle of the Mojave Desert.

A picture-perfect town, perfect for blowing up.