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

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

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

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

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

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

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

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

When you visit his grave, be sure to rub the Great Emancipator's nose for good luck.

The original vault that held the president's remains still stands, empty, not far from where he was finally buried.

Abraham Lincoln's likeness rests at the top of this giant totem pole.

First known as the "Sample House," this construction mash-up was meant to be a living catalogue of building styles.

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

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

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

Built in 1869, this now-retired structure looks more like a medieval fortress than a county lock-up.