One of the few surviving "Wigwam"-themed motels.

The world's longest known cave system.

Built around 1845, this house was occupied for 100 years, serving as a home to a prosecuting attorney, a Union Civil War general, and a wealthy socialite.

This pair of eccentric Ohio castles were built by a pair of brothers who wanted to bring a bit of class to the Ohio wilderness.

This 30,000 square-foot museum is home to an extensive collection of art and artifacts that reflect the history of southwest Ohio.

Inside houses a vast collection of military aircraft and missiles spanning the ages.

These sub-farmland caves are home to a majestic stalactite known as the "Crystal King."

The largest earthwork effigy in the world.

This magnificent Cincinnati graveyard is also a popular public park.

An unusual, super-sized grocery adventure awaits in an Ohio suburb.

An abandoned munitions factory with a shot tower continues to wage war on the surrounding environment.