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

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

A unique botanical garden housed in three giant geodesic domes.

This small archipelago in northern Lake Superior was formed by a massive meteorite impact 450 million years ago.

One of the finest examples of a black soil prairie that was barely saved by the Great Depression.

Every winter, the wind carves blocks of frozen water into beautiful abstract shapes inside this unusually curved tunnel.

A remote hill on a stretch of country road where the laws of physics are defied... or so it seems.

Symbolic attempt to overcome the issues of life.

Part of a worldwide art project, this mysterious semicircle of concrete shapes holds the pieces of a larger story.

These pink granite water slides are the result of millions of years of erosion.

A subterranean haunt where wine and homemade biscottis are always on the menu.

A massive bur oak tree believed to be some 500 years old is the centerpiece of this quiet urban greenspace.

Tiny treasures, giant murals, and strange sculptures decorate the windows and doors of this abandoned building.

The carved remains of a 200-year-old oak tree memorialize the namesake of the iconic "Wizard of Oz" character.

Eclectic collection of rare and beautiful stones in a historic home.

This lagomorph-obsessed Route 66 emporium is home to a giant jackrabbit that sits in a bunny graveyard.

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

Cemetery featuring rare glass-fronted columbarium.

Roses and other fascinating flora fill this garden built to commemorate Britain's immortal Bard.

The murals have transformed a residential alley into a vibrant drive-through gallery.

A train ride to the middle of nowhere gives its passengers some of the most iconic views of Japan's seasons.

Step into Monet's world at this fine-dining restaurant in the middle of a New Jersey sculpture park.

Roman ruins top white travertine terraces formed by ancient hot springs.

The world's largest collection of the world's largest objects is in one small Illinois town.