This majestic tree has survived 400 years of storms, droughts, and floods, and is a beloved natural landmark in Missouri.

The iconic remains of the original Academic Hall that burned down in 1892.

Like Stonehenge, but with boats and oodles more charm.

Curious cave that stays a cool 56 degrees all year long.

400 million-year old limestone caverns nestled in the Ozarks served as shelter and a hideout for cultures throughout North American history.

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

A mythical bird etched into the face of a rock doubles as the mascot for a nearby school.

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