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

A bronze statue of Mister Rogers in the neighborhood where he grew up.

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

The Paul Bunyan of the steel industry.

This eccentric mansion museum holds a impressive collection of rare and automatic instruments.

A piece of baseball history is preserved in a Pittsburgh parking lot.

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

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

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.

This plaque marks a place where one of Hollywood’s most famous dancers got his start.

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 quiet, gothic haven nestled between Pittsburgh's Squirrel Hill and Point Breeze neighborhoods.

This historic Pittsburgh tennis complex is a rare example of natural red clay courts.

Pennsylvania's own Roswell-style UFO mystery.

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

This titanic java kettle is one of the many kitschy landmarks located along America's OTHER famous highway.

This Art Deco service station has been providing tune-ups and turning heads for close to a century.

Overshadowed by quilts, the artistry of these patterned textiles went underappreciated for too long.

Built in the 1970s, this curious modular home found new life as a sundae-shaped ice cream stand.

An abandoned stretch of highway, deteriorating next to the operational one.

A pyramid commemorates the birthplace of James Buchanan, the 15th president of the United States

These etchings reveal the history of a long-gone quarantine site.

Home to the Titanic Historical Society's collection.