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

This sculpture was designed to encourage viewers to be true to themselves.

A daily replay of the experiment that proved the rotation of the Earth.

One of the largest crucifixes in the world stands 55 feet tall in a secluded, wooded area of northern Michigan.

Housed in a century-old building, this museum's dedicated not just to soft drinks, but to the free enterprise system.

A spectacular overlook of the Little Grand Canyon of the San Rafael River, a deep sandstone gorge streaked with orange, red and white in a remote, uncrowded part of Utah.

According to one local tradition, the entrance to the Voodoo underworld can be found in New Orleans through seven gates scattered throughout the city's French Quarter.

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

The first KFC is on the National Register of Historic Places.

This crucial gathering spot along the "hippie trail" still displays old notes between traveling beatniks and backpackers.

A bronze sculpture of a monkey sits outside this factory, which has made an anise-flavored liqueur for over 150 years.

A curious whirlpool formation supposedly capable of entangling or engulfing branches, tree trunks, or whole rafts full of hapless tourists.

A local road runs around a memorial to a teenager who died in 1860.

Discovered by a soldier during the Revolutionary War, these springs helped create an iconic South Carolina ginger ale.

The house that Southern rock built now stands as a monument to one of the genre's favorite families.

A nourishing complex of found object art, paintings, and sculptures that celebrate key figures in Black history.

A 120-year-old legend concerning an empty circular patch in the North Carolina woods.

A heroic pigeon that, through a barrage of gunfire, delivered a message that saved over 100 lives in World War I.

A monument to a Native American leader who was known for never breaking a promise and met his end after signing a deal with white settlers.

A gregarious Ohio resident has been building his whimsical temple to peace for decades.

A slab of sandstone covered with mysterious 1,000-year-old rock carvings from a vanished North American culture.

The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

This presidential tomb was not dedicated until years after Harding's death due to personal controversy.