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

Records of the dead describe the myriad odd ways people used to die.

One of only two remaining Victorian-era greenhouses in New York.

A mass grave for victims of one of the city’s worst fires.

A museum dedicated to antique toys, collectibles, and nostalgia.

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.

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

These ornate manhole covers were used for a now-forgotten purpose.

The once abandoned ruins of a Victorian beachside amusement park are now back in working order.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

An iconic steel and chrome diner from the 1940s left empty for nearly 20 years is in danger of being demolished.

An abandoned Depression-era zoo hidden just off the highway.

Ruins of a historic medical facility sits eerily by the water.

A miniature village lies nearly forgotten in the forest by the side of a major highway.

A castle inspired by medieval architecture is hidden in the woods of Connecticut.

The ruins of an abandoned 18th-century town that is slowly being reclaimed by the forest.

New York's unstoppable progress turned this cemetery into the smallest burial ground in the city.

A collection of fanzines, recordings, and documents detailing the rise and influence of the feminist punk movement.

Final resting place of Typhoid Mary.

This old estate is a remnant of when the Bronx was a popular summer destination for wealthy New Yorkers.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

An antique cemetery in New York, this land is home to any number of famed corpses.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

This Orthodox Church's exterior is rather unorthodox.