Though his role as the inventor of baseball may be up for debate, fans still festoon Doubleday's grave with baseballs.

This site is believed to be connected to the oldest house in Arlington County.

Recorded as the first person buried in Arlington Cemetery.

Remnants of a wall built to separate Black residents of Hall's Hill from a newly built subdivision are a grim reminder of segregation in 20th-century Virginia.

A gift from Scotland to the United States in memory of the 270 lives lost when Pan Am Flight 103 exploded over Lockerbie due to a terrorist bombing.

In what is rumored to be an intentional act of spite, this memorial almost completely obscures the nearby grave of a senior officer.

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

This millstone-topped marker details the history of a mill that served as a landmark for both Union and Confederate soldiers during the American Civil War.

In 1932, Americans honored their first president's 200th birthday by planting trees.

Dedicated to a U.S. Army lieutenant colonel who was also a bird watcher and artist.

A small and somewhat hidden memorial to 68 local veterans of the Vietnam War.

The only labyrinth within the city of Alexandria.

This marker at the entrance to the Humphreys Engineer Center honors the former Chief of the Army Corps of Engineers.

This small pedestal marks the spot of the first lot of land sold in Alexandria, Virginia in 1749.

Home to a 27 room house, this estate was crafted by Black entrepreneur Olander Banks Sr.

This pharmacist and his patient greet visitors to the National Community Pharmacists Association.

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.

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

A superbly preserved example of Georgian residential architecture that was once home to one of the founders of Alexandria, Virginia.

The former home of Thomson Francis Mason, the mayor of Alexandria from 1827-1830.

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

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

A massive, majestic mammal watches over pedestrians from his perch atop a former B.P.O.E. lodge.