The preserved remains of the former Milwaukee County Hospital for the Insane are hidden in the wooded grounds of County Park.

The birthplace of a titan of American cinema.

A large circus museum with summer performances.

According to the legend, this strikingly beautiful hill has miraculous healing powers.

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

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

A restaurant and lodge in northern Wisconsin which served as a clandestine hideout for John Dillinger and featured one of the most famous botched FBI raids in history.

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

Behind a modern brick exterior lies the oldest continuously-operating lunch-car diner in the United States.

More than 5,000 contemporary and "historic" mustards from around the world.

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

This cave holds a surprisingly colorful variety of geological oddities.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

The juke joint where legendary soul artists ate, drank, and made merry.

Elvis's own personal tropical hideaway.

This Memphis recording studio launched the careers of Jerry Lee Lewis, Johnny Cash, and Elvis Presley.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

Prolific outsider artist Sid Boyum's concrete sculptures add whimsy to Madison's Schenk-Atwood neighborhood.

A renowned Civil War veteran, this Bald eagle now presides over the Wisconsin State Assembly.

Comprised of Spanish war cannons, this sculpture once graced the bow of a WWI warship.

The final resting place of one of Thomas Jefferson's formerly enslaved sons.

A bronze plaque marks the site of the only show the "King of the Soul Singers" ever missed.

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

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