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

This jail which was in service for over a century is now open for curious visitors.

Step inside Lucy, the world's largest "elephant."

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

In which a local geological marvel becomes a quaint roadside attraction.

A failed piece of Orientalism has become the proud symbol of a community.

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

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

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

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

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

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.

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

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

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

This local gem houses the largest collection of pre-Raphaelite paintings outside of the U.K.

This historic old movie house was the scene of one of the Blob's most iconic attacks.

A blend of art, antiquities, and Americana fill this museum, surrounded by whimsical, enchanting gardens.

Pennsylvanian mass grave and possibly mass murder.

This might just be the TARDIS of bookstores.

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.