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

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

The legacy of baseball great Roberto Clemente is preserved in a retired Pittsburgh fire station.

The slate extracted from these Pennsylvania quarries was once hailed as the finest in the world.

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

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

Where the oil industry began.

The origin of this mechanical boy was a mystery until he revealed his maker by writing it in perfect cursive.

Yo, Adrian!

This stately 19th century library pushed architectural boundaries at a time when the public library movement was just taking off.

This little museum in the town where zombies were born celebrates the living dead.

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

A living maritime paradox still floats in the same lake where it was built and resurrected... or was it?

With 3,000 bikes on display, the world's largest bicycle museum includes some famous rarities.

This 19th century machine put animals (including humans) in boxes to study how they metabolized calories.

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

The first American axe throwing club.

True to his word, George Swanson is buried in his white 1984 Corvette.

Priceless space junk on display in front of a local Dairy Queen.

This spot memorializes one of the greatest plays in NFL history, unless you happen to be a Raiders fan.

No one knows who painted this mysterious mural in a Penn State basement.

This historic Pittsburgh tennis complex is a rare example of natural red clay courts.

This Old Testament garden features 100 plants from biblical times.

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