More than five miles of underground passageways.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

An equine tribute in a charming Southern city that calls itself "The Horse Capital of the World."

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

This grave marks the final resting place of a legendary frontiersman... unless it doesn't.

An abandoned theme park with a strange and tumultuous past.

Moonbows over Kentucky.

Prehistoric animals decorate this popular outdoor park.

The world's longest known cave system.

The oldest operating Mississippi River–style steamboat still navigates the Ohio River.

The only quarter of the Old City not dedicated to a major world religion.

A "miracle" that seems to produce more holy fistfights than holy revelations.

A floating museum that was sunk by a flood and left to rot in the tides.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

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

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

A curiosity-seeker's paradise set inside a three-story historic school house.

Kentucky's longest operating jail is now a spooky spot to spend the night.

A theme park featuring a replica of Noah's Ark built to the measurements specified in the Bible.

A full-scale replica of a 1774 colonial settlement in Kentucky.

This huge clock made of flowers and simple machinery was once used a political weapon.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

Unique tower has outlasted a takeover of the company.

This tombstone marks the final resting place of the beloved 1990's character, Ernest P. Worrell.