The National Park Service Civil War Defenses of Washington:
open daily from dawn to dusk except Jan 1, Thanksgiving, Dec 25
Free admission.
Wikipedia https://en.wikipedia.org/wiki/Fort_Stevens_(Washington,_D.C.)
Official Website https://www.nps.gov/places/fort-stevens.htm
More information http://www.nps.gov/cwdw/historyculture/fort-stevens.htm
Phone +1 202 895 6070
Address 13th & Quackenbos Washington DC 20011 United States
Coordinates 38°57'51.798" N -77°1'45.08" E