Illegal drag racing two stories beneath Chicago’s streets.

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

A historic beacon built in the aftermath of the worst maritime disaster on the Great Lakes.

Roses and other fascinating flora fill this garden built to commemorate Britain's immortal Bard.

This massive airship factory is so large that it has its own indoor weather.

This permanent exhibition celebrates the finest of our heartless automatons both real and fictional.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

There aren't too many operational funiculars around, but Pittsburgh has two!

This spot memorializes one of the greatest plays in NFL history, unless you happen to be a Raiders fan.

Color-coded signs direct drivers on a network of routes designed to avoid Pittsburgh traffic.

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

A portion of the old Pirates stadium over which a defining home run once flew still stands even after the rest of the stadium was torn down.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

Sections of the iconic limestone columns have been left uncleaned as a reminder of the city's polluted past.

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

These disused steel furnaces are now haunting ruins that may one day be a national park.

This shrine to McDonalds' most iconic sandwich holds a 14-foot tall burger.

A larger-than-life statue of America's favorite sundae marks the place it was invented.

This dramatic rail curve was once the target of a failed Nazi attack.

This 19th century machine put animals (including humans) in boxes to study how they metabolized calories.

Penn State's giant bug collection.

No one knows who painted this mysterious mural in a Penn State basement.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

Where the oil industry began.