This spot in St. Louis, marked with a simple sign, has seen more pro baseball than just about anywhere else in the world.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

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

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

One of few surviving standpipe water towers in the U.S.

The first rural cemetery west of the Mississippi is home to the elaborate tombs of St. Louis' local beer barons.

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

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

A kitschy, creepy St. Louis mainstay.

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

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

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