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.

This is not your typical jungle gym.

The Magic House provides a beautiful and creative environment for curious youngsters to get their knowledge on.

The high point on the 16th president's eponymous roadway is marked by a massive version of his head.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.