North America's oldest quarantine facility was built in response to Philadelphia's 1793 yellow fever outbreak.

A legendary boxing venue and ring featured in Rocky V.

The slate extracted from these Pennsylvania quarries was once hailed as the finest in the world.

The oldest of only three existing statues of the great novelist stands in a city he did not care for.

A pyramid commemorates the birthplace of James Buchanan, the 15th president of the United States

This colonial mansion has been home to a staggering number of American historic figures.

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

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

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.

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

The headquarters of the Fraternitas Rosae Crucis, complete with Rosicrucian pyramids, all in the Pennsylvania woods.