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

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

The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

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

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

This abandoned prison castle has become an imposing gallery of graffiti art.

Once an ambitious nature spa, these forest ruins now provide a serene monument to failure.

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

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

A late sculptor's last project was to turn this abandoned cement factory into a castle-themed amusement park.

Over 600 vacuum cleaners stack the shelves of what may be the cleanest museum in America.

This museum presents a dogged pursuit of 500 years of veterinary history.

A subterranean haunt where wine and homemade biscottis are always on the menu.

After miraculously surviving a giant flood, the 19th-century nut tree and its offspring are protected with their own tiny park.

If there's another drive-through golf-cart bar in a bat-filled cave on top of a mountain, we don't know about it.

This mosaic-covered bar is brimming with curated curios.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

Undone by Prohibition, this abandoned brewery-turned-flour mill is now ready for its third act.

A gem in the small Missouri town where Winston Churchill coined the term "Iron Curtain" and effectively began the Cold War.

The fastest mail service in the west is tracked and memorialized along this 1,400 mile trail.

The ruins of a 19th century shelter run by the Independent Order of Odd Fellows.

A museum dedicated to man's boldest venture.

An unexpected but incredible collection of wildlife dioramas spanning rainforests, swamps, forests, and plains.

Speak to a companion on the other side of the room loud and clear through this architectural anomaly.