The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.

This forgotten building was one of the few Philadelphia-area breweries to survive Prohibition.

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

One of the oldest of its kind.

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

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

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

These lush botanical gardens employ the most purrfect pest control force.

A local prank turned town icon.

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

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

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

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

This hidden gem of a garden has one of the only surviving Victorian ferneries in America.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

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 taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

World's first "penitentiary," meant to be humane, drove men insane.

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

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

This beloved marketplace mascot poops money and grants good luck.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.