The only statue of its kind to commemorate Washington's beginnings as an officer of the British Colonial Militia.

This icon of the Atomic Age now lays dormant.

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

America's smallest national park site is the former residence of exiled Polish national hero Thaddeus Kosciuszko.

A museum commemorating the Donora Smog, which killed 20 people in October 1948 and sparked national outrage over air pollution.

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

Each step is a mere four inches tall, said to be measured by the stride of a woman wearing a hobble skirt.

An occult-y, historic hotel with the World's Largest Ouija board on the roof.

The first of Lancaster's "rural cemeteries."

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

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

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

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

A pride of the state, this working museum crafts pottery mosaics in the style of Pennsylvania's earliest European settlers.

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.

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

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

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

This restaurant offers a side of antiques, curios, and a bathroom chock full of owls.

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

An ideal wedding spot that is almost too ideal.

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

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