Final resting place of Geronimo, Quanah Parker, and the first atomic gun ever fired.

This little slice of old Jerusalem in Oklahoma is the evolution of a 90 year old passion play.

The collection is housed in an exquisite mansion that makes you feel like you've been transported to an Italian villa.

The largest land animal skull ever discovered.

American bison herd descending directly from a Bronx Zoo breeding program that saved the species from extinction.

Collection of skeletal systems from the "world's leading supplier of osteological specimens."

The world's only museum devoted solely to the art and collection of action figures.

The future of roadside attractions is this sci-fi soda mecca that is home to a 66-foot tall neon pop bottle.

Nature's biggest mammal swims in landlocked Oklahoma.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

The only visible remains of this ancient Greek underground temple is its roof protruding from the earth.

This clifftop arch is a natural stunner.

Also known as the Temple of Poseidon, this is one of the best-preserved Greek temples in the world.

A Roman temple perched over an Italian town, forgotten several times over.

The oldest church in Mantua was buried for centuries under the facades of other structures.

Psychoanalyst Carl Jung reported a paranormal experience after visiting this mosaic-lined Roman baptistry.

A medieval, mosaic-lined baptistry built by a heretical Christian sect.

The roof of this ancient mausoleum is made from a single Istrian stone weighing a massive 230 tons.

An incredible mosaic-lined monument said to have held the remains of an ancient Roman empress.

Caligula's colossal pleasure ships, discovered by Mussolini only to be lost in flames.

This 6th-century church has the largest and best-preserved collection of Byzantine mosaics outside Constantinople.

Fountain where visitors can earn a license to be mad.

The walls and streets of the ancient city are peppered with penises.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.