Creek water that starts here has a 50/50 chance of ending up in the Atlantic or the Pacific.

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

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

A goddess-topped water fountain in Chicago was created thanks to the dreams of a thirsty newsboy.

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

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

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

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

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

These chunky stone towers out in Lake Michigan are the key to Chicago’s drinking water.

Home to a protest movement, a bombing, and a dramatic change in labor history.

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

A shining sculpture made of 3,115 lights, the number of visible stars in the Northern Hemisphere.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

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

A museum dedicated to exhibiting remarkable outsider art.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

Odd outsider art installations surround a Gold Rush-era ghost town.

The abandoned remnants of a little sanctuary for world peace that fell into disrepair.

The remains of a World War II munitions factory still haunt the fields of this Twin Cities suburb.

If astronomy had a ghost, it would look like this observatory.

The only castle in North America to ever house European sovereigns.