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

Illegal drag racing two stories beneath Chicago’s streets.

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

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

A gothic church spire sits atop this skyscraper, the tallest church in the world.

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

This historic hotel invented the chocolate brownie.

A military museum and library dedicated to the citizen soldier.

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

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.

An outdoor urban gallery of large-scale artworks by the world's most influential street artists.

How did a 2,000-year-old Roman column find its way to a Chicago park?

A colorful square marks the heart of the city's LGBTQ community.

A building so large that it has its own weather.

This abandoned NASA launch site is now a memorial to a trio of astronauts who were killed there.

Believed to be haunted, this old cemetery is beautifully adorned with Spanish moss hanging from the trees.

A tribute to a hometown hero and surfing legend.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

Quirky water tower advertises the long-gone Brooks Tomato Products Co.

The site of Billy the Kid’s most famous escape and the end to the Lincoln County War.

This Boeing KC-97 tanker is now a restaurant for aviation lovers.

Hidden beyond a kitschy giant beetle is this remarkably sprawling collection of preserved insects.