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

These lush botanical gardens employ the most purrfect pest control force.

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

A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

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

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

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

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

This jail which was in service for over a century is now open for curious visitors.

This museum boasts a bucket of teeth and tells the tale of a 20th-century dental circus.

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

The abandoned coal loading dock is a canvas for unsanctioned art.

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."

Yo, Adrian!

This hidden gem of a garden has one of the only surviving Victorian ferneries in America.

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.

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

A museum dedicated to the strange and extravagant costumes and memorabilia of the mummers, a tradition older than Philadelphia itself.

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

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

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