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

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

The graffitied ruins stand hidden within the Pennsylvania woods.

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

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

This Old Testament garden features 100 plants from biblical times.

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

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

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

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

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

The oldest surviving botanic garden in the United States.

This might just be the TARDIS of bookstores.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

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

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

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

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.

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

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.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

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