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

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

This rooftop sign has been confusing Milwaukee-bound airline passengers for decades.

This storied music venue was once a tavern that housed an Italian Anarchist book club and prohibition parties; today it's a community space for artists and musicians.

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

Statue dedicated to the star of an old television show.

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

This striking art museum holds an amazing series of curiosity cabinets.

These modest Midwestern formations are kin to Niagara Falls' impressive cliffs, more than 600 miles away.

A permanent outdoor art installation made up of more than 100 mushroom-shaped lights.

This steam locomotive served as both an interesting static display and unique playground equipment since 1959.

This cave holds a surprisingly colorful variety of geological oddities.

A bypass decorated with large wooden troll carvings.

This huge stew pot is the focal point of the "Community Soup" event, which honors tradition and soup.

The final resting place of Gary Gygax; co-creator of Dungeons and Dragons.

An unusual statue in Wisconsin of the first daily comic strip character.

The modern birthplace of Irish freedom.

Legend says Dungeons and Dragons players can get their dice blessed at the creator of the game's memorial.

Robots, lasers, and whoopee cushions, oh my!

A wonderfully curated used bookstore in an airport.

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

A unique botanical garden housed in three giant geodesic domes.

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