Eons old volcanic activity created one of the most stunning rock formations in the United States.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

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

Where experiments are conducted on all things wood.

The oldest continuously-operating tavern in Wisconsin used a clever loophole to serve alcohol during Prohibition.

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

A collection of 1,300 accordions of all shapes and sizes displayed in chronological order.

The spaceship-like theater, which is still in use, was one of the most popular exhibits at the 1964 New York World's Fair.

A unique botanical garden housed in three giant geodesic domes.

A former barn converted into a massive train diorama.

Farms are serving pizza made from their own fresh crops, a growing trend in the American Midwest.

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

Once a speakeasy operated by Al Capone, this Milwaukee cigar bar is now a haven for ghost hunters.

Five acres of divinely inspired folk art.

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 pebble beach is so beautiful that taking its rocks is against the law.

This cave holds a surprisingly colorful variety of geological oddities.

A bizarre house filled with an astounding array of collections.

This quirky roadside attraction provides insight into Minnesota's logging history.

Where you can photograph wild black bears without worrying about becoming dinner.

Journey through the largest remaining peat bogs in the contiguous United States to see the wilderness as it once was.

Sleepy Minneapolis block beats Guinness Record for most churches on one city block.

This vintage "streetcar boat" lay at the bottom of Lake Minnetonka until the 1980s.