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

A group of artists transformed this desolate city alleyway into an outdoor gallery of street art.

Six tiny houses built for working class people form the largest intentional cluster of Wright homes anywhere.

A unique botanical garden housed in three giant geodesic domes.

Statue dedicated to the star of an old television show.

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

The only Bahá'í house of worship in North America and one of only a handful worldwide.

All of Chicago's wood-paved streets are long gone but two alleys remain.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

The palatial McDonald's that inspired Wesley Willis.

The last remaining vestige of a popular 1999 public art display.

Louis Sullivan’s dark, swirling cast-iron designs envelop a popular department store in this Chicago landmark.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

The last masonry skyscraper ever built reveals a transitional moment in architectural history.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

A journey begins with a single step, and for many, the road-trip of a lifetime started at this Chicago intersection.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

A spectacular remnant of an Adler and Sullivan masterpiece that was destroyed in 1972.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

Also known as the Osaka Garden, this garden was originally built in 1893 as part of the World's Columbian Exposition.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

This church in Pittsburgh is home to the largest collection of religious relics in North America.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.