The meeting of the northwestern corner of Delaware, the northeastern corner of Maryland, and the southern edge of Pennsylvania.

A daily replay of the experiment that proved the rotation of the Earth.

Yo, Adrian!

World's first "penitentiary," meant to be humane, drove men insane.

These lush botanical gardens employ the most purrfect pest control force.

A failed piece of Orientalism has become the proud symbol of a community.

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

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

Hidden behind an empty field resides this early 19th-century cemetery.

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.

Metal monsters made from repurposed materials lurk alongside this Pennsylvania road.

A toxic ghost town sitting atop a massive coal fire.

Beautiful views of the surrounding hills and birds of prey can be found at this sanctuary.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

An Olympic hero stripped of his medals is buried in a town he never visited, which took his name after his death.

Mysterious rocks that ring musically when struck.

An eccentric priest's tribute to George Washington, this chapel tells the story of the American Revolution.

A well-preserved example of an early industrial operation in the northeastern United States.

Amazing pre-Civil War ruins alongside a shallow, rocky river that hosts beautiful (but endangered) lilies.