The world's largest woodcarving collection includes dozens of Bible scenes and a wooden bestiary, all carved by one man.

Surrounded by industrial sprawl, a small monument marks the site of William Penn's first landing in Pennsylvania.

This 15-foot tall obelisk commemorating the Philadelphia-Baltimore railroad connection sat neglected for over a century.

The oldest active church in Pennsylvania is also the second oldest Swedish Church in the United States.

The only geyser in the state of Pennsylvania is caused by pressure from an abandoned coal mine outside of the ghost town Centralia.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

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

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

"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.

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

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

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

Mysterious rocks that ring musically when struck.

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

A layered tribute to the work of mosaicist Isaiah Zagar.

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

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