The graveyard holds the remains of Irish immigrants who arrived in Queens after fleeing the Great Famine.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

To find the "unicorns of the deep" you've got to go downstairs.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

These pretty kitties killed and ate as many as 135 railway workers.

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

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

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

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

Illegal drag racing two stories beneath Chicago’s streets.

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

This memorial plaque remembers a strangely shallow maritime disaster known as "Chicago's Titanic."

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

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

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

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

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

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

This alley in downtown Chicago held the bodies of over 600 people after the fateful Iroquois Theatre fire.

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

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

This awkward aquarium sculpture is one of the strangest statues in Chicago.

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

This historic hotel invented the chocolate brownie.