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

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

Steepest flood safety railway in the entire world.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

Despite being stolen multiple times, this civic electrician's street corner Snoopy won't be stopped.

A glittering Thai Buddhist temple in suburban Pennsylvania.

Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

Behold the rickety wooden glory of the world's oldest operating roller coaster.

The pop art icon's gravesite is broadcast 24 hours a day on his museum's website.

A local prank turned town icon.

The residents of the Neighborhood of Make-Believe live without much fanfare within the Pittsburgh Children's Museum.

An outlandish shoe shaped house built by an eccentric millionaire.

This public space is speckled with the eerie remnants of a defunct amusement park.

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

A historic covered bridge is but one example of an oddly prevalent American urban legend.

The ruined remains of a coal mining ghost town are hidden within the woods.

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

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

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

The graffitied ruins stand hidden within the Pennsylvania woods.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.