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

The first of Lancaster's "rural cemeteries."

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

A preserved 18th century homestead in Western Pennsylvania marks the spot where the Whiskey Rebellion began.

A soon-to-be-forgotten roadside spectacle loaded with local lore.

The residents of this ominous-sounding street in Pennsylvania liked its name so much they fought to keep it.

A tiny, unmarked beer and whiskey bar above an Ethiopian restaurant in West Philly fails to conceal live bluegrass.

The site of the little-known Pennsylvania battle that sparked the Seven Years' War.

The final resting place of the Hollywood star who came to a tragic end.

A diorama of the Civil War, fought by cats.

Where the oil industry began.

A museum of anything and everything Stooge.

Intricate storybook scenes are tucked inside these shadow boxes, which are tucked inside a library in the Pocono Mountains.

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

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

This public space is speckled with the eerie remnants of a defunct amusement park.

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

An otherwise quiet campground becomes a bustling medieval town for two weeks every year.

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

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.

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

North America’s largest collection of horological devices and home to a colossal clock with a dizzying array of features.