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

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

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

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

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

A kitschy, creepy St. Louis mainstay.

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.

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

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

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

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

Symbolic attempt to overcome the issues of life.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

A collection of outdoor art by renowned muralist Robert Dafford depicts the history of a flooded city.

The lowest point in the state of Illinois, at the confluence of the Mississippi and Ohio rivers.

An enormous natural sandstone bridge in Kentucky.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

You have to love a museum with a truly dedicated focus. A focus on Superman, for example.

Now nearly abandoned, Kaskaskia was once the capital of Illinois and one of the most important towns on the upper Mississippi.

Planes, trains, and automobiles have all been sunk as attractions at this Illinois diving spot.

The hometown of Popeye's creator is littered with a growing collection of granite cartoon characters.

This simple gravestone remembers a pig who single-hoofedly raised $19,000,000 for the Navy.

Even with its slightly risible name this colossal cross is still able to inspire awe.