An abandoned skate park located in the middle of the wilderness.

This historic furnace was once used to produce cannonballs during the Civil War.

It may appear to be a fancy junk yard, but each item has a story to tell and a lesson to impart.

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

Ancient rock-hewn town that witnessed key events of Georgian history.

These hooded graves are the only of their kind in the United States.

This museum pays tribute to the largest group in the Iroquois Confederacy.

Town full of spiritualists, some of whom are mediums, is still in full swing after 130 years.

The first and only American institution dedicated to the enduring value of comedy in the United States.

Catch a ride through the Pennsylvania countryside on this historic narrow-gauge railroad.

A hidden piece of Altoona's railroad history in a long-forgotten abandoned town.

This dramatic rail curve was once the target of a failed Nazi attack.

Journey through a collection of over 35,000 Halloween items from all generations.

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

This lush forest valley was once mined for lumber to the extent that it was once nicknamed "The Pennsylvania Desert."

Contrary to what one might expect, ice forms inside this small cavern during the summer and melts during the winter.

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

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

Locals call this magical moss-covered walkway the "Emerald Path."

Hidden in the hills of Western Pennsylvania lies one of the best-kept ghost towns in America that you can legally visit.

This icon of the Atomic Age now lays dormant.

A preserved 18th century homestead in Western Pennsylvania marks the spot where the Whiskey Rebellion began.

A macabre farm reserved part of its 222-acres for dead bodies, all in the name of science.

Each step is a mere four inches tall, said to be measured by the stride of a woman wearing a hobble skirt.