A trailblazing sovereign nation tucked in the American state of Wisconsin.

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

Statue dedicated to the star of an old television show.

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

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

These curious caverns have been home to mushrooms, gangsters, and disco.

Triangular House built on a leafy residential street in St. Paul.

The literary king of the Jazz Age was born in this lovely Minnesota home which still honors his legacy.

Downtown Minneapolis mixed art and function by turning some of their sewer covers into works of art.

Direct, creative challenge to Mother Nature's winter wrath.

Eight "Guardians of Health" protect this art deco water tower from pollutants and bacteria.

The only arched bridge made of stone on the entire Mississippi River.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

Secret hideaway for an alternative beach experience.

When flour explodes, it's not a pretty sight.

A whimsical sensor instrument for Minneapolitans to play on their walks to work.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

The face of a woman pushes its way through the earth.

The largest historic preservation organization in the United States.

This hidden stream beneath Indianapolis makes an appearance in the best-selling novel "Underground Airlines."

The body of one of the world's most famous outlaws is covered in cement and iron to prevent it from being stolen.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

A flamboyantly decorated bridge signals diversity and fellowship at the entry to Indianapolis' Broad Ripple Village.

Once strictly off-limits, this lower level housing curious and priceless vehicles of the Petersen Automotive Museum is now open to the public.