Great Falls Park, McLean, Virginia

At Great Falls Park, an 800 acre U.S. National Park Service site in Virginia, just outside Washington, D.C. The park is situated along the Potomac River and is part of the George Washington Memorial Parkway. Located within the park are the remains of the Patowmack Canal, the first canal in the United States which used locks to raise and lower boats.

The park is only open 6 hours per day during the winter.

There are hiking trails, picnic spots, and 3 overlook area's within the park.

The Great Falls of the Potomac River.