Valley Forge is the encampment site of the Continental Army during the winter of 1777-1778.
The park features 3,500 acres of monuments including Washington’s Headquarters (a stone house on the Schuylkill River which he occupied 1777 to 1778), the early-20th-century National Memorial Arch and the Muhlenberg Brigade’s recreated log-cabin barracks.
Originally Valley Forge State Park, it became a national historical park in 1976.