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

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

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

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

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

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

A beautiful oddities shop crammed with strange and morbid curiosities.

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

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

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

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

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

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

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

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

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

A rare view of a preserved Victorian science museum.

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

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

Mysterious rocks that ring musically when struck.

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

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.