These massive concrete balls were used to mine gold in Virginia.

Standing for over 200 years, the abandoned home of a Revolutionary War hero and later a succession of prison superintendents.

Soldiers were buried next to Lee's house in the center of Arlington Cemetery to dissuade the general from reclaiming his property after the war.

The tomb was guarded by soldiers from both sides of the war, and some left their initials carved in the brick.

Rowdy rebels fortified this home during the first popular uprising in United States history.

This brick-lined pedestrian walkway was once a railway tunnel used during the Civil War.

Hear, smell, see, taste, and touch history at this immersive Civil War hospital.

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

This stately building in Alexandria, Virginia was built by Freemasons to honor one of their most famous members.

An out-of-place Air Force radar dome is all that denotes this park as a former missile launch site.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

The Virginia home of one of the signers of the Declaration of Independence is being preserved with a unique glass facade.

An innovative attempt to break a siege in the American Civil War still scars the earth today.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

Collecting 700 years of mechanical death-dealing, the NRA's sprawling gun museum is a revealing testament to the American obsession with armament.

Under a playground is a little-known sealed train tunnel that likely contains the bodies of workers trapped by cave-ins.

This museum explores the grim reality of life in the earliest British colonies in America.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

At 207 feet, one of the world's longest continuous escalators.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

This war hero's old shop remembers the fine line between medicine and quackery during the Revolutionary War.

This pre-Revolutionary War grist mill ground corn and flour for soldiers in seven American wars.

The Virginia farm where John Wilkes Booth met his grisly end is now largely forgotten.

This beautiful vintage movie palace has seen little change in form or function since the 1920s.