Odd castle-like structures for collecting water sticking out of the Mississippi River.

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

The maximum security facility was once thought to have "the bloodiest 47 acres in America."

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

Oversized statues are just the tip of this nostalgic Americana roadside attraction.

The world's largest man-made underground caverns offer unparalleled underwater wonders.

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

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

A historic house in St. Louis was plagued by a series of suicides committed by family members involved in a successful brewery.

Hundreds of graffiti artists have decorated this flood-wall on the west bank of the Mississippi River.

A plaque on the side of a parking garage marks the burial place of a great Ottawa chief.

One of the world's earliest skyscrapers.

Less a museum than a bizarre fantasy world created by artists and engineers.

During the 19th-century, this park was a vital trading fort.

Though it's thrived abroad, this forgotten Dunkin' rival has just one store left in the States.

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

The owners of this Victorian-era estate say it’s still visited by the spirits of long-gone residents.

A taxidermy “mermaid,” vampire-killing kits, and hundreds of other bizarre objects are housed at this quirky museum.

This life-size bronze statue remembers the tallest recorded human in his Illinois hometown.

Once a speakeasy operated by Al Capone, this Milwaukee cigar bar is now a haven for ghost hunters.

This quirky museum has a collection of more than 15,000 bobblehead dolls.

The bugs crawling down the front of this office building are almost as big as a '68 VW Beetle.

This striking art museum holds an amazing series of curiosity cabinets.

A place to eat for on-the-run agents and espionage enthusiasts.