An 18th-century Catholic church converted into an eccentric temple of music and bacchanalia.

One man's real life disfigurement inspired a lasting local legend surrounding an eerie tunnel.

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

These disused steel furnaces are now haunting ruins that may one day be a national park.

It would take 35 firetrucks to fill this enormous glacial pothole.

Pennsylvanian mass grave and possibly mass murder.

The Home and murder site of the witch of Rehmeyers Hollow.

America's first serial killer rests in anonymity.

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

The ruined remains of a coal mining ghost town are hidden within the woods.

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

A quiet, gothic haven nestled between Pittsburgh's Squirrel Hill and Point Breeze neighborhoods.

A macabre farm reserved part of its 222-acres for dead bodies, all in the name of science.

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

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

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

In the early 1800s, surgery was also a show.

The oldest farmer's market in America is so ancient it was approved by the King of England.

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

The graffitied ruins stand hidden within the Pennsylvania woods.

This Old Testament garden features 100 plants from biblical times.

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

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