It would take 35 firetrucks to fill this enormous glacial pothole.

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

These disused steel furnaces are now haunting ruins that may one day be a national park.

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.

Long hidden under grime, the politically radical murals of a little known Yugoslavian master are finally getting their due.

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

Board a mine car and descend the #190 slope 300 feet underground into the Clark Vein of coal.

Priceless space junk on display in front of a local Dairy Queen.

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

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

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

One man's real life disfigurement inspired a lasting local legend surrounding an eerie tunnel.

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

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

Yo, Adrian!

Pennsylvania's own Roswell-style UFO mystery.

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.

This recreation of a 19th-century dime museum is full of oddities.

This museum boasts a bucket of teeth and tells the tale of a 20th-century dental circus.

A beautiful oddities shop crammed with strange and morbid curiosities.

Pennsylvanian mass grave and possibly mass murder.

The oldest surviving botanic garden in the United States.

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

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