A treehouse assailed by the elements and the government, now gone.

An old soap company building now houses one of Minneapolis’s oldest independent non-profit art galleries.

The oldest remaining frame residence in Minneapolis.

One of the world's premier laboratories for hydraulic engineering research takes full advantage of the water's power.

A Foundry on a Sleepy Street.

This French Canadian classic is a specialty of the oldest continually used church in Minneapolis.

A warehouse for all of your architectural details.

Funhouse of found art and participatory sculpture.

An architecturally-focused antique shop.

20,000 pieces in a Frank Gehry-designed building.

This lab's maddening silence is good for business but bad for sanity.

Hidden on the 7th floor of a historic building, this Cajun spot features wall-to-wall bottles of hot sauce.

A European-style bath house in Chicago.

The palatial McDonald's that inspired Wesley Willis.

A small Chicago museum filled with thousands of preserved butterflies, beetles, and more.

This historic house museum that celebrates one of the world's most influential social reformers is also one of the most haunted locations in Chicago.

Over 1,000 pieces of one of the most niche art objects imaginable: the glass paperweight.

A Japanese temple, old German townhouses, and public chess tables offer a peaceful escape from the bustle of the North Side.

Rifle through images of skyscrapers, Worlds Fairs, and more in the largest public postcard repository in America.

You can take a class, browse the library, or visit the lavish lair of an international men's humor society.

Assemble a masterpiece at the first and only North American school exclusively dedicated to mosaic art.

Former meatpacking facility turned vertical farm and sustainable business complex.

The world's only known button museum.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.