The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

The land is home to swimming ponies and a legendary 18th-century treasure.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

Funded by John D. Rockefeller, this is one of the earliest, and most beautiful, shopping arcades in America.

Rare recess caves fill this unbelievably beautiful Ohio park.

The home made famous by the 1983 holiday classic is now a perfectly preserved shrine to the movie.

Near-constant high winds deform the trees on Spruce Knob, the highest point in West Virginia.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

One Pittsburgh musician's decades-in-the-making memorabilia collection is on display at this rock-n-roll curio shop.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

Steepest flood safety railway in the entire world.

Pennsylvania's highest point is spotted with boulders which were pushed to the surface by nothing but cold.

Behold the rickety wooden glory of the world's oldest operating roller coaster.

With 3,000 bikes on display, the world's largest bicycle museum includes some famous rarities.

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

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

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

A restored Pittsburgh house of God has been converted to a marvelous house of suds.

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

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.