One of the Cemestos prefab homes built to secretly house thousands of Manhattan Project workers.

This former maximum-security prison is creepy, sobering, and supposedly haunted.

Better known as the "Body Farm," this unique research facility has been studying how human bodies break down since the 1980s.

Before TV meteorologists, there were weather kiosks. This may be the last one in the United States.

The world's largest version of this iconic puzzle cube is located in Knoxville, Tennessee.

Knoxville’s architectural icon was the symbol of the 1982 World’s Fair, even catching the googly eye of Bart Simpson.

Once a gas station, this flightless airplane beside the Old Dixie Highway now houses a barbershop.

This high point in the Great Smoky Mountains is said to be home to the chief of all bears.

This chestnut box will not be opened until the country music legend's 100th birthday in 2046.

An airy would-be solution to a housing shortage.

All that remains of Okinawa's royal temple are a restored gateway and a tall banyan tree.

“It's the quality” (but probably also the drive-through donut tunnel) that has attracted diners since 1968.

The echoes of a railroad town that solemnly mark the end of the line.

A charming desert roadside bakery that produces 10 times more bread daily than it has residents in its town.

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."

A pair of large white marble lions guard this stretch of the Mojave Desert, and it is utterly mysterious how they got there.

The unusual burial monument of Arizona's first governor.

This replica of the Greek structure is in the heart of Nashville.

A secret fresh water spring for animals and humans alike hidden along the most famous road in the United States.

This once-booming Gold Rush town is now home to a herd of feral donkeys.

Thousands of glyphs created by an unknown culture decorate the rock formations of this canyon.

This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.

A metal ring in the middle of the road marks the exact spot where the Soviet satellite crash-landed in 1962.

Statue dedicated to the star of an old television show.