A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

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

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

The mortal remains of a Russian prince, priest and paranormal investigator who came to America in 1792.

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

America's first serial killer rests in anonymity.

A larger-than-life statue of America's favorite sundae marks the place it was invented.

Behold the rickety wooden glory of the world's oldest operating roller coaster.

This shrine to McDonalds' most iconic sandwich holds a 14-foot tall burger.

It would take 35 firetrucks to fill this enormous glacial pothole.

A local prank turned town icon.

These disused steel furnaces are now haunting ruins that may one day be a national park.

One man's real life disfigurement inspired a lasting local legend surrounding an eerie tunnel.

Pennsylvania's own Roswell-style UFO mystery.

This park contains a number of standing stones meant to heal and inspire.

This Pennsylvania cave holds evidence of the oldest known inhabitants of North America.

A macabre farm reserved part of its 222-acres for dead bodies, all in the name of science.

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

Yo, Adrian!

This recreation of a 19th-century dime museum is full of oddities.

Pennsylvanian mass grave and possibly mass murder.

The oldest farmer's market in America is so ancient it was approved by the King of England.

The Home and murder site of the witch of Rehmeyers Hollow.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.