This cannon dating to 1755 has stood guard at this suburban intersection since 1915.

This field of concrete was once an active defense site armed with nuclear warheads.

Once the largest trading firm of enslaved people in the U.S., this building is now a museum that preserves Alexandria's dark past.

This homestead was occupied by Union soldiers, who believed the owners were signaling Confederate forces.

These trees are living witnesses to events that inspired poet Walt Whitman’s service during the American Civil War.

A memorial dedicated to a highly decorated Marine and Korean War veteran, who also happened to be a horse.

An eponymous directional signpost erected by the first president of the United States.

This little brick tunnel built by Confederate forces was used to conduct surprise attacks on the railroad.

The most historic church in Fairfax County played a role in the creation of the American Red Cross.

This former Cold War missile control site played an important role in the creation of GPS.

This tree is a living witness to the beginning of the Civil Rights Movement.

One of the oldest train stations still standing in Virginia played a vital role during the Civil War.

This historic, one-acre island is the only legal place to camp in the city of Richmond.

The Pentagon sits on a former island that was in Virginia at low tide and D.C. at high tide.

Conveniently located within binocular range of a nuclear bunker, the "summer camp" area was a painfully obvious spy house.

Burke’s oldest cemetery also houses the victim of the county's grisliest murder.

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

The Kirkland Monument remembers a selfless Civil War hero who braved the battlefield to give water to his dying enemies.

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

The final resting place of an unidentified revolutionary soldier sits behind a Virginia church.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

This cannonball stands as a reminder of the final act of a fleeting governor amidst a revolution.

Outdoor exhibits explore the contributions of European, African, and indigenous peoples to American frontier culture.

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