Home of the only civilian casualty at the Battle of Gettysburg.

Beautiful views of the surrounding hills and birds of prey can be found at this sanctuary.

A dramatic, 360-degree recreation of Pickett's Charge in the Civil War.

This historic old movie house was the scene of one of the Blob's most iconic attacks.

North America’s largest collection of horological devices and home to a colossal clock with a dizzying array of features.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

A daily replay of the experiment that proved the rotation of the Earth.

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

A local prank turned town icon.

Pennsylvanian mass grave and possibly mass murder.

An outlandish shoe shaped house built by an eccentric millionaire.

This elaborate towering structure was once famed for its revolutionary height.

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

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

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

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

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.

In which a local geological marvel becomes a quaint roadside attraction.

A modern ghost town whose inhabitants were driven away by the growth of nuclear power.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

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

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

Mysterious rocks that ring musically when struck.