This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

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

A beloved horticultural oasis on the grounds of a wealthy family's former estate.

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

Frank Lloyd Wright built this suburban synagogue late in life, but it stands among his most iconic masterpieces.

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

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

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.

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.

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

A rare view of a preserved Victorian science museum.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

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

Yo, Adrian!

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

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

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

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

A layered tribute to the work of mosaicist Isaiah Zagar.

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

Century-old shop, specializing in Occult products.

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