The history of the treatment of mental illness, illustrated in all its gory detail, and housed in an asylum.

A museum devoted to osteopathy and its creator, Andrew Still.

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

Erosion and time have created a naturally-formed water park.

Giant granite rocks standing end-to-end like a train of circus elephants.

In the St. Francois Mountains in the Ozarks at 1,772 feet above sea level, Taum Sauk Mountain is the highest (and possibly oldest) peak in Missouri.

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

This historic cliffside mansion uses a natural cave for air conditioning.

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

Destroyed by flood waters, prison now serves as a training ground for armed forces.