This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

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

Century-old shop, specializing in Occult products.

One of Philadelphia's largest murals resides hidden under this bridge.

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

A layered tribute to the work of mosaicist Isaiah Zagar.

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

Deliciousness abounds at a Guatemalan restaurant masquerading as a pizzeria.

The last standing puppet theater on Long Island.

Could it have picked a better place to land?

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

An ideal wedding spot that is almost too ideal.

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

An almost life-sized elephant named Ms. Ellie greets visitors at this jumbo-themed museum.

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

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

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

An 18th-century Catholic church converted into an eccentric temple of music and bacchanalia.

An outlandish shoe shaped house built by an eccentric millionaire.

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

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

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

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.