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

This simple stone memorial remembers a secret, Geneva Convention-defying interrogation base from WWII.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

A commemorative plaque at the door pays tribute to an "American Patriot" known for his betrayal.

The nearly 120-year-old piece of pork wears a brass collar and was once a man's "pet ham."

A museum in the heart of Virginia peanut country devoted to the humble goober.

The former home of the man whose radical ideas changed the nation.

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 massive complex is made up of hundreds of smaller temples that date back to the ninth century.

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

This abandoned amusement park was built on a site with a dark history.

The oldest arched-covered bridge in Virginia has truly withstood the test of time.

Forget Hollywood, one of the biggest stars in the world can be found in Roanoke, Virginia.

The narrowest house in America is seven feet of pure spite.

This Virginia railway overpass is said to be haunted by a serial killer in a rabbit costume.

Pennsylvania's own Roswell-style UFO mystery.

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

Maryland's first (and last standing) toll house on America's first federal road established the state as the "Gateway to the West."

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

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

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

The farm where one of America's greatest leaders was raised is now a well-appointed landmark.

The longest escalator in the Western Hemisphere takes over three minutes to ride down.

The childhood home of the Sultan of Swat is just a line drive away from Oriole Park at Camden Yards.