Remnants of the most densely packed city in world history, that thrived on anarchy for 30 years.

A colossal floating restaurant built to look like a ancient Chinese imperial palace.

This hulking behemoth is actually five interconnected towers built in the 1960s.

Despite its name, this fast food museum is actually a replica of the ninth McDonald's store.

You can take a class, browse the library, or visit the lavish lair of an international men's humor society.

A student designed this 3D-printed scale replica of the entire university campus.

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.

The famous author's birthplace is preserved in a town that he once described as narrow-minded.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

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

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

An antiquated German apothecary on Chicago's North Side.

One of the few remaining relics of the meatpacking hub that made Chicago the "hog butcher to the world."

This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

A strange rock in Chicago marks the spot where a tree once stood in honor of the 18th President.

A hollow cement depiction of time's inexorable effect on the human body.

The final resting place of up to 6,000 Confederate soldiers, the largest mass grave in the Western Hemisphere.

This modest post office sits on the site of H.H. Holmes' famous murder castle.

Chicago's largest cemetery is full of beautiful Victorian monuments and more than a few ghost stories.

A large circus museum with summer performances.

"World's largest scrap metal sculpture" stands in an outdoor sculpture garden in the middle of Wisconsin.

Hidden away in the city of Madison, Wisconsin is a nearly forgotten home that Frank Lloyd Wright built for a childhood friend.

More than 8,000 drinking jugs say “Cheers!” to a guy named Toby.

This shallow cave got its name from copious amount of human bones found inside.