Arguably the best example of an authentic Dutch windmill in the United States, rivaling its counterparts in the Netherlands.

These abandoned grain silos and tunnels are an urban exploration dream.

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

To find the "unicorns of the deep" you've got to go downstairs.

A theme park attraction designed to turn your children into LARPers.

A six-story-tall golden pyramid, surrounded by a moat.

A stone marker memorializes the spot where the King broke up a street fight with a classic karate stance.

The arboretum whose marshy soil sucked up the dreams of housing developers.

This supper-club-turned-concert-venue still serves drinks at its original rotating bar.

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

One of the largest aviation events in the world brings half a million aircraft enthusiasts to Wisconsin each year.

A wonderfully curated used bookstore in an airport.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

Charleston's historic city jail once held everyone from pirates to Civil War POWs.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

Disney World's very first waterpark is now an abandoned ruin being reclaimed by the swamp.

Disney's abandoned animal island is now an overgrown ruin that was almost the coolest attraction ever.

Formerly known as National D-Day Museum, this collection commemorates the battles of Normandy and WWII.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

A museum and shop on Bourbon Street located in the French Quarter.

One of the few working locomotive roundhouses in the United States.

Berry Gordy Jr.'s old home was the original headquarters of Motown Record Corporation.

One man's attempt to create an artistic wonder on a run-down block in Detroit.

The only surviving prototype for Buckminster Fuller's house of the future.