These beautiful ruins deep in the Pennsylvania woods are thought to have been a ski lodge or a speakeasy, but no one really knows.

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

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

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

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

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

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

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

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

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

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

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

One of the steepest streets in the United States makes an intriguing challenge for cyclists.

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

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

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.

This permanent exhibition celebrates the finest of our heartless automatons both real and fictional.

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

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

An abandoned stretch of highway, deteriorating next to the operational one.

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

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.