Where the oil industry began.

"Where the ducks walk on fish."

It marks the spooky spot where the bodies of two young boys were found in the 19th century.

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 museum of anything and everything Stooge.

This giant disembodied horse head seems to balance impossibly on its nose.

The final resting place of two members of the infamous Doan gang, notorious outlaws and Revolutionary War Loyalists.

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

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

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

This semi-spooky remnant of an abandoned hotel provides fantastic views.

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

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

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

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

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

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

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

A rock maze opens up to a panoramic viewpoint at an abandoned mine full of ghost stories.

What looks like a simple quaint estate in rural Pennsylvania was in the 18th century home to a small monastic community.

The last street in Pittsburgh that's paved with wood.

One of the oldest log cabins in America is one of the last of its kind this historic Swedish dwelling remains a piece of living history.

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