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

Collection of trolley cars in the woods represent one man's attempt to preserve transportation history.

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

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

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

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

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

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

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.

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

Huge masonic hall in Philadelphia with lavishly themed rooms.

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

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

Found art has transformed this Pittsburgh neighborhood into a psychedelic dream.

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.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

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

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

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

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

Mysterious rocks that ring musically when struck.

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