A memorial for an outsider theorist who believed that the planet is actually hollow.

What is it about mushrooms that makes people wish they lived inside of them?

An obsolete, vanishing traffic device warns Cincinnati drivers away from middle-of-the-road obstructions.

The oldest brick house in the state of Ohio.

An art deco ice cream shop covered in vintage train station tiles.

After a water tower painting was accused of being an ad, a simple fix was made that gave the city a motto.

A trailblazing sovereign nation tucked in the American state of Wisconsin.

One of Frank Lloyd Wright's final works was this UFO church.

Robots, lasers, and whoopee cushions, oh my!

A forgotten Cold War relic hidden in the outskirts of a Wisconsin city.

A giant, Gilded Age mansion that once belonged to the beer baron of Milwaukee.

Statue dedicated to the star of an old television show.

A place to eat for on-the-run agents and espionage enthusiasts.

Wisconsin's most celebrated export gets the royal treatment on I-94.

This house renovated by Frank Lloyd Wright was the centerpiece of a lavish 20th-century estate.

A largely forgotten and touching neoclassical marble fountain overlooking a bear mound effigy.

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

A house and yard adorned with bizarre concrete sculptures in a Milwaukee suburb.

Literally a million fascinating cartographic artifacts are held in this sprawling university collection.

What appears to be a wizard's lair in Milwaukee actually houses a massive water pipe.

Complex aquaponics systems allow fish and plants to grow in harmony.

An off-the-beaten-path place to literally hang beneath Milwaukee's Holton Street Bridge.

The bugs crawling down the front of this office building are almost as big as a '68 VW Beetle.

A factory in Milwaukee where poop is reclaimed… and recycled.