South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

Contrary to popular belief, this secluded statue doesn't represent Pennsylvania's founder.

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

Sports history, made in the Arroyo Seco.

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

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

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

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

The souvenir got the company’s founder out of a pretty pickle at the World’s Fair.

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."

The largest clock face in the United States is twice the size of Big Ben and infinitely more ad-sponsored.

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

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

The Pennsylvania shopping center was once the setting for the 1978 film, "Dawn of the Dead."

This university transit system is a 1970's vision of the future.

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

The god of wine stares out at passersby on this busy Pittsburgh thoroughfare.

This one-room cabin where the young colonel slept during the French and Indian War.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

The world’s largest concentrated solar plant generates as many problems as megawatts.

One of the oldest of its kind.

Current docking place of the SS United States, the fastest transatlantic ocean liner.

A museum dedicated to the history and art of staying clean.

These century-old beehive-shaped kilns were built to produce charcoal for nearby mines.