In which a local geological marvel becomes a quaint roadside attraction.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

Once the "Eighth Wonder of the World," this iron railroad bridge was decimated by a tornado.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.

A toxic ghost town sitting atop a massive coal fire.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

The world’s first penitentiary, meant to be humane, drove men insane.

This statue of two men in a rowboat was erected to honor those who died while fishing in the Chesapeake Bay.

A state park that once served as an important river crossing, and now offers protected lands for endangered plants and animals.

One of the only memorials dedicated to journalists who died in combat.

Home of the physician who set the leg of John Wilkes Booth after the Lincoln assassination.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

This historic lighthouse was well known for the large number of women who served as its keeper.

A mammoth pair of Civil War artillery guns abandoned out in the forest.

An isolated island home to one of the oldest English-speaking communities in the region and Maryland's state dessert.

This beautiful stone arch bridge wasn't even expected to stand for one day, but people have been crossing it for centuries.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

Built by the patriotic residents of Boonsboro in a single day.

A Civil War Museum with some notable medical antiques.

The final resting place of the tragic king and queen of the Jazz Age is tucked away in a small Maryland graveyard.

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

This bug-eyed water wheel uses the power of the Sun to clean up Baltimore Harbor.