A star fort along the C&O Canal in western Maryland that protected America in three wars.

Rediscovered after a century, the father of the American Navy was reinterred in something dredged up from Davy Jones' Locker.

This one-room cabin where the young colonel slept during the French and Indian War.

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

A monumental statue of RCA's mascot now sits atop a historical society roof after a life of moving around.

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

A pre-Industrial Age iron furnace and the site of a nearly-forgotten piece of Black history.

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

A Civil War Museum with some notable medical antiques.

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

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

An abandoned church gets a second life as a massive beer hall and event space.

This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.

Walk a trail through a historic Quaker town that outlawed slavery in 1777 and was a major waypoint on the Underground Railroad.

The land is home to swimming ponies and a legendary 18th-century treasure.

Bizarre Cavern.

A museum dedicated to exhibiting remarkable outsider art.

A modest walled graveyard where nobody is actually buried.

The site of the notorious Camp Sumter Prison is now a peaceful memorial.

A popular oddity on display in a stately building, offering a symbolic commentary.

An eerie site of reverence for those who have completed an epic journey.

After just one epic test blast, this literal loose cannon proved too explosive for combat.

More than a century after her death, Little Gracie Watson remains one of Savannah's most often-visited residents.

A statue honoring 44 continuous years of greeting passing ships.