Alexander Hamilton’s creation caused quite a bit of controversy.

A planned settlement in Pennsylvania once housed the aristocratic refugees of the French Revolution.

Hidden behind West Philadelphia rowhomes is a haven for migratory and local bird species both ordinary and rare.

This forgotten building was one of the few Philadelphia-area breweries to survive Prohibition.

The Master of Magnetism dominates the walls of a scrap metal yard to keep graffiti artists at bay.

A hidden piece of Altoona's railroad history in a long-forgotten abandoned town.

An Irish Memorial commemorating those who perished due to potato blight.

The world's third-largest crystal sphere has sat in the Penn Museum since 1927 with the exception of one outlandish theft.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

The body of St. John Neumann and his collection of hundreds of relics, on display in a Philly church.

Current docking place of the SS United States, the fastest transatlantic ocean liner.

Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

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

America's first serial killer rests in anonymity.

The ruined remains of a coal mining ghost town are hidden within the woods.

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

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

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

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

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

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

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

This Philly cemetery is the eternal home of many famous area residents, including Rocky Balboa's wife.

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