prohibits excavation, removal, or displacement of archaeological resources. The significance of the Patowmack Canal in the development of the young nation is evident in its designation as a National Historic Landmark. The Patowmack Canal is a National Historic Civil Engineering Landmark, and a Virginia Historic Landmark. The remains of the Seneca canal still exist on the Virginia side, opposite Violette's lock (on the C&O Canal). Visitor information Great Falls Park is open to the public daily, with an admission fee. Safety is a primary concern in the Park. Prohibited activities include alcohol, open fires, swimming, wading or crossing of any open water. Sporting activities such as rock climbing and kayaking at Great Falls Park should be conducted only by experienced persons familiar with the dangers and safety protocols involved therein. These are dangerous grounds and accidental deaths are not uncommon. The park had 27 deaths between 2001 and 2013. The Patowmack Canal Trail is accessible by wheelchair as far as Lock 1. The trail surface consists of compacted soil with no curbs. The National Park Service opened a wheelchair accessible overlook to the Great Falls in January 2005 and was renovating a second overlook to the Great Falls due for completion in late May 2005. The Great Falls section of the canal, along with the archaeological remains of Matildaville and other nearby canal-related sites, were designated a National Historic Landmark in 1982, as one of the nation's earliest efforts at large-scale civil engineering, reflective of the visions of two of its Founding Fathers, George Washington and James Madison. See also List of National Historic Landmarks in Virginia National Register of Historic Places listings in Fairfax County, Virginia References Further reading External links Great Falls Park Map Archaeological sites in Virginia Canals in Virginia Chesapeake Bay watershed Potomac River watershed Buildings and structures in Fairfax County, Virginia Transportation in Fairfax County, Virginia George Washington Memorial Parkway Canals on the National Register of Historic Places in Virginia Historic districts in Fairfax County, Virginia National Historic Landmarks in Virginia National Register of Historic Places in Fairfax County, Virginia Historic American Engineering Record in Virginia Historic districts on the National Register of Historic Places in Virginia Historic Civil Engineering Landmarks