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

An Irish Memorial commemorating those who perished due to potato blight.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

The first American department store, and home to the largest operating musical instrument in the world.

This elaborate towering structure was once famed for its revolutionary height.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

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

Dr Barnes' $25 billion private collection of art and arboretum.

The abandoned coal loading dock is a canvas for unsanctioned art.

Enjoy a slice while browsing the world's largest collection of pizza memorabilia.

Where America’s first doomsday cult awaited the end of the world.

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.

The oldest surviving botanic garden in the United States.

The corporeal remains of Napoleon III's dentist rest under this 15-story obelisk.

A tiny, unmarked beer and whiskey bar above an Ethiopian restaurant in West Philly fails to conceal live bluegrass.

Hidden behind West Philadelphia rowhomes is a haven for migratory and local bird species both ordinary and rare.

The oldest of only three existing statues of the great novelist stands in a city he did not care for.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

This 25-foot-tall gorilla made his way from the Wildwood boardwalk to a Pine Barrens gas station and deli.

Rising out of a clearing in New Jersey's Pine Barrens is an Aztec-inspired monument to the "Lindbergh of Mexico."

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.