A field of nothing but boulders which resembles a giant's gravel driveway.

This park contains a number of standing stones meant to heal and inspire.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

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

Steepest flood safety railway in the entire world.

This Old Testament garden features 100 plants from biblical times.

One of the oldest log cabins in America is one of the last of its kind this historic Swedish dwelling remains a piece of living history.

There aren't too many operational funiculars around, but Pittsburgh has two!

A historic covered bridge is but one example of an oddly prevalent American urban legend.

A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

North America's oldest quarantine facility was built in response to Philadelphia's 1793 yellow fever outbreak.

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

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

The internal railway of one of the biggest steel plants in America has been transformed into a linear park with unique industrial views.

The home and studio of a visionary woodworker now stands as a museum and example of his artistic genius.

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

The Home and murder site of the witch of Rehmeyers Hollow.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

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

Pennsylvanian mass grave and possibly mass murder.

When the Austin Dam failed it destroyed much of Austin...and then it failed again.

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

This church in Pittsburgh is home to the largest collection of religious relics in North America.