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

Century-old shop, specializing in Occult products.

The headquarters of the Fraternitas Rosae Crucis, complete with Rosicrucian pyramids, all in the Pennsylvania woods.

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

This strange, big-tailed beast became a Pennsylvania town's unofficial mascot.

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

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.

This weeping, 10-foot-tall sculpture was a maquette for a 9/11 memorial.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

Seven people are buried in the middle of what's now a movie theater parking lot.

This semi-spooky remnant of an abandoned hotel provides fantastic views.

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

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

Ship skeletons haunt Baltimore's waterways.

A hidden alley in urban Baltimore is a haven for graffiti artists.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

Eighteen miniature death-scene dioramas.

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

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

Instruments, apparatus, and rare books all relating to chemistry and its related sciences.

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

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

This museum explores the grim reality of life in the earliest British colonies in America.

The only place for a truly presidential dram.