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

Famously misunderstood wonder of the ancient world

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

New Zealand's epic shrine to all things puzzling.

The glacier tucked within a New Zealand rainforest.

This strange geological landscape erupts with sudden bursts of water.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Belly up to the bar in Cowtown, don't forget to buy some boots.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

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

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Less a museum than a bizarre fantasy world created by artists and engineers.