This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.

North America's oldest quarantine facility was built in response to Philadelphia's 1793 yellow fever outbreak.

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

The oldest surviving botanic garden in the United States.

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

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

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

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

Step into a pastel time capsule where candy is truly dandy.

Old neon signs from the City of Brotherly Love provide a snapshot of the city’s evolution.

Mysterious rocks that ring musically when struck.

An extraordinary collection of vampire-themed antiques lurks on the second floor of a store.

A historic covered bridge is but one example of an oddly prevalent American urban legend.

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

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

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

Designed by Horace Trumbauer in 1893, this Gothic-style castle is now a home for academics.

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.

A tiny, unmarked beer and whiskey bar above an Ethiopian restaurant in West Philly fails to conceal live bluegrass.

These medicine cabinet staples are part of the museum's collection of everyday objects.

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

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

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