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

Built to defend Washington D.C. during the Civil War, this fort became a post-war nucleus for a thriving Black community.

The Aldie Gristmill was once the largest factory of its kind in Loudoun County.

Originally dubbed "Retirement" by the Navy Commodore who built it in 1780, this beautiful mansion is now the centerpiece of a suburban community park.

Hidden in the forest atop a long, winding driveway is this stately home.

This "castle" is actually a limestone and quartz formation hidden along a trail.

The first national memorial to honor all women suffragists stands on land where suffragists were once imprisoned.

Right next to departures—how convenient!

A throwback to 1980's gaming nostalgia.

This unique structure is the only one of its kind in Virginia.

The only surviving 19th-century water-powered mill found in the Washington, D.C. area.

A home that witnessed Civil War combat on the Sunken Road has the battle scars to prove it.

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

The only remaining African American schoolhouse in northern Virginia is now a museum dedicated to formerly enslaved people.

This estate on the banks of the James River was home to a Founding Father, two presidents, a famous bugle melody, and what some say was the actual first Thanksgiving.

This church is known as "The Home Church of George Washington and George Mason."

This monument is dedicated to those lost on June 6, 1944, in the town with that day’s highest per-capita casualty rate.

At Brandy Station, Civil War soldiers left their mark on the battlefield and the walls of this small wooden house.

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

The final resting place of a controversial man who was instrumental in plucking the banjo from obscurity.

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

These unusual rooms on wheels are holdovers from the 1960s.

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

The naval commander’s proudest moment in battle is memorialized in this unique tomb at Arlington Cemetery.