This public park was the site of the largest civilian disaster of the Civil War.

The Cold War-era "underground Pentagon" is a sprawling subterranean hideaway for the Defense Department.

A giant ball made from pieces of an old Jeep.

A small museum along the Susquehanna River is home to a rich collection of Native American artifacts.

The famous bell was secreted away and hidden in a church in Allentown during the British occupation of Philadelphia.

Where the "World Pinball Champion” is crowned.

A unique workspace where offices reside on pirate ships and inside gingerbread houses.

A miniature golf course crafted inside the world's largest simulated cave.

This picturesque stream was up until recently the site of a ten story mountain of slag and sewage.

For decades, it has disappeared and reappeared as water levels rise and fall.

A retired firefighter created this contraption so he and his family wouldn't die if accidentally buried alive.

Nothing says indulgence like a 1,500-pound chocolate castle.

An ideal wedding spot that is almost too ideal.

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

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

Meet your friends, marry your true love, or tell your enemies to kiss your butt under this historic Pittsburgh timepiece.

A museum dedicated to the history & joys of the trail & your best chance to see hikers throwing up ice cream.

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

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

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

The only geyser in the state of Pennsylvania is caused by pressure from an abandoned coal mine outside of the ghost town Centralia.

This dramatic rail curve was once the target of a failed Nazi attack.

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

According to local myth this cemetery is half evil spirits, half good—split down the middle.