A museum dedicated to man's boldest venture.

This lagomorph-obsessed Route 66 emporium is home to a giant jackrabbit that sits in a bunny graveyard.

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

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

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

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.

A notorious Route 66 eatery once frequented by Al Capone.

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

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

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

An abandoned meat mecca now serves as an excellent locale for urban exploration.

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

An abandoned factory along the Mississippi coated by a giant mural.

A kitschy, creepy St. Louis mainstay.

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

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

A big museum full of little worlds.

An extensive collection of fine art devoted to man's best friend.

This is not your typical jungle gym.

University City's quirkiest resident lives in a park named after its first.

An urban forest overtakes what was the greatest failure of utopic urban housing.

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

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