Man-made geyser that rises to the exact height of the Gateway Arch.

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

A chessmaster's dream destination.

This is not your typical jungle gym.

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

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

A museum dedicated to man's boldest venture.

A geological oddity formed by two rivers carving out a mass of limestone on both sides.

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

This art deco masterpiece was once a miracle spring mecca but is now simply a government office building.

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

The largest land animal skull ever discovered.

This museum holds not just a world class collection of firefighting artifacts and gear but even the region's first fire station itself.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.

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.

The scant remains of an expansive indigenous civilization can be seen at this Arkansas state park.

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

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

This ostentatious Italianate palace of an Oklahoma billionaire is filled with several themed mini-museums.

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.

The only diamond mine in the world where you can keep what you find.

The Old Mill shown in the opening credits of “Gone With the Wind” is actually fairly new, and was never a mill at all.

A wild trout fishery in Arkansas.