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

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.

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

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.

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

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

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

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

In the parking lot of a fast food restaurant, a statue memorializing a prolific bull elephant.