This geothermal hot spring hides beneath a slowly growing mineral dome.

Historic town settled in the 19th century because of its convenient location along a popular coal transport route.

World War II bunker still standing on the New Jersey beach.

This historic iron-working village is now a ghost town so immaculate that it looks as though it was recently built.

A unique sculpture park that specializes in the huge and bizarre.

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

Where the famed frontiersman was born, raised, and survived Quaker intrigue

Frank Lloyd Wright built this suburban synagogue late in life, but it stands among his most iconic masterpieces.

An Olympic hero stripped of his medals is buried in a town he never visited, which took his name after his death.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

A pride of the state, this working museum crafts pottery mosaics in the style of Pennsylvania's earliest European settlers.

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.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

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

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

Instruments, apparatus, and rare books all relating to chemistry and its related sciences.

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

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

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

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

In the early 1800s, surgery was also a show.

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

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