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

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

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

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

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

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

This church in Pittsburgh is home to the largest collection of religious relics in North America.

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

The house that Frank Lloyd Wright "(shook) out of his sleeve at will" at the age of 86.

The graffitied ruins stand hidden within the Pennsylvania woods.

This Old Testament garden features 100 plants from biblical times.

A train station that was abandoned by the coal industry and was later converted into a cocktail bar.

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

This might just be the TARDIS of bookstores.

The universally beloved children's television figure is interred on a high hilltop in one of western Pennsylvania's oldest cemeteries.

Over 100 concrete munitions bunkers are all that remain of a Pennsylvanian village seized by the US government.

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

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.

Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.

In which a local geological marvel becomes a quaint roadside attraction.

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

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

A park full of outsider art, created by college students studying outsider art.

Mutant vegetables, transgenic mosquitos, and atomic rodents span the walls of this one-of-a-kind museum.