The oldest active church in Pennsylvania is also the second oldest Swedish Church in the United States.

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

The body of St. John Neumann and his collection of hundreds of relics, on display in a Philly church.

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

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

Yo, Adrian!

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

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

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

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

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

A layered tribute to the work of mosaicist Isaiah Zagar.

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

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

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

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

Two men built this castle on the Florida coast as an artistic “landscape sculpture.”

Intricate storybook scenes are tucked inside these shadow boxes, which are tucked inside a library in the Pocono Mountains.

The uniquely-designed winter home and sculpture studio of Anna and Archer Huntington.

This historic mansion was built as a symbol of love between a husband and wife.

Its columns were all carved from the same white oak tree.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This haunting tombstone comes complete with a heartbreaking story of love and loss.