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

Entombed in this strange, white stone hill are the deadly remains of radioactive weapons production.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

A vertically floating hemlock controls the waves and weather at Crater Lake.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

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

Despite a legend that says this highest peak in Oregon was climbed in high heels, scores of people have died on its slopes.

Kentucky, Tennessee, and Virginia meet at this point in the Cumberland Gap.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

The magic's in the hole!

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

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.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

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

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

One of few remaining antique carousels with stationary animals in the U.S.

This is not your typical jungle gym.

European castle ruins in an American state park are actually the product of death and grief.

A geological oddity formed by two rivers carving out a mass of limestone on both sides.