A historical marker marks..................this US Civil War......defense line........just across the street from A Span whore house.......

History

Fort Woodbury was a lunette with a 275-yard perimeter and 19 emplacements for 13 guns. It stood in what is today Arlington's Courthouse neighborhood, near the current Arlington County Courthouse and atop one of Arlington's highest hills. It was close to the current location of Fort Myer. The fort is named for Major D.P. Woodbury, the engineer who designed and constructed the Line.^[1]
Woodbury Heights, a high-rise condominium built in the 1980s near the Fort Woodbury site, is also named for the fort.
A historical marker memorializes the fort's location and is located at North Court House Road and 14th Street North. The marker's inscription reads:
"Immediately behind the present Court House stood Fort Woodbury, a Iunette in the Arlington Line constructed in August 1861. It had a perimeter of 275 yards and 19 emplacements for 13 guns. It was named for Major D.P. Woodbury, the Engineer who designed and constructed the Arlington Line."

References

1. 
   

Cooling III, Benjamin Franklin; Owen II, Walton H. (6 October 2009). Mr. Lincoln's Forts: A Guide to the Civil War Defenses of Washington. Scarecrow Press. pp. 107–109. ISBN 978-0-8108-6307-1.