An outlandish shoe shaped house built by an eccentric millionaire.

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

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

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

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

The Pennsylvania landscape depicted by a quarter mile of mosaics made from used road signs.

A quiet, gothic haven nestled between Pittsburgh's Squirrel Hill and Point Breeze neighborhoods.

Pennsylvanian mass grave and possibly mass murder.

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

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

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

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

The oldest farmer's market in America is so ancient it was approved by the King of England.

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

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

A failed piece of Orientalism has become the proud symbol of a community.

A mine fire has been burning under the deserted town since 1962, but this church is still going strong.

This Old Testament garden features 100 plants from biblical times.

The first American department store, and home to the largest operating musical instrument in the world.

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

A train station that was abandoned by the coal industry and was later converted into a cocktail bar.

This meticulously extracted nervous system allegedly came from a 19th-century custodian who donated her body to science.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

The oldest surviving botanic garden in the United States.