On forested hills surrounding the nation's capital are the remnants of a complex system of Civil War fortifications. Built by Union forces, these strategic buttresses transformed the young capital into one of the world's most fortified cities.
http://www.nps.gov/cwdw/planyourvisit/directions.htm
6625 Georgia Ave, NW
Washington, DC 20012
Biking Hiking Photography
NPS - National Park Service