Once a giant gingerbread factory, this space now hosts exhibits and workshops on the historic treat.

The final resting place of the great navigator, or maybe his brother.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The fastest mail service in the west is tracked and memorialized along this 1,400 mile trail.

Ancient snack bar of the Roman Empire re-opened.

Home of an evil witch famous within southern folklore.

A multi-storied adobe complex has been inhabited for more than a thousand years.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

Southern Italy's spinning top village.

Visit this playground of waterfalls, caves and sinkholes.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The prototype for all Nazi concentration camps.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

This Nazi-built amphitheater was constructed on a sacred mountain site used by various German cults.

The world's longest known cave system.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

A bizarre roadside attraction and the first instance of miniature golf in the world.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.