13th Street NW and Quackenbos Street NW, Washington DC 20011
President Abraham Lincoln risked life and limb to view the skirmishing here July 12, 1864, as Confederate Gen. Jubal Early approached Washington from the north. The Confederates never threatened seriously but shook things up a little. The fort is partially preserved and interpreted. Less than a mile north of the fort is the tiny but interesting Battleground Cemetery.
Open daylight hours. Free.