Where hills of dirt conceal the burial ground of one of the most powerful ancient Native American societies.

The world's tallest statue of an American hero.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

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

A small "palace" and museum made of, and devoted entirely, to salt.

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

A modernist landscape of water and sci-fi concrete.

A recreated Stonehenge stands in a country field, complete with Easter Island moai heads standing as sentries.

Crumbling hotel echoes with the sounds of the '30s.

The most famous location in China was home to whole dynasties worth of imperial rulers.

Hoax, mistake, or evidence of dinosaurs in human times?

A battle between nature and architecture in the Cambodian jungle.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

The once highest point in China blends symbolic design with a kick of adrenaline.

An out-of-place slice of France, smack in the middle of Shanghai.