Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

Pennsylvania's own Roswell-style UFO mystery.

Its vintage camera collection gives a snapshot of the past as viewed through a photographic lens.

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

This restaurant offers a side of antiques, curios, and a bathroom chock full of owls.

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

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

The first American department store, and home to the largest operating musical instrument in the world.

This public space is speckled with the eerie remnants of a defunct amusement park.

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

Delicate Wurlitzers, creepy clowns, and The Noid all share space in this insane explosion of kitsch history.

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

The oldest surviving botanic garden in the United States.

This little museum in the town where zombies were born celebrates the living dead.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

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

House of vintage taxidermy and Steampunk sculptures in a quiet Pittsburgh neighborhood.

A rare view of a preserved Victorian science museum.

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

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

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