Chesapeake and Ohio Canal was built in late 1790’s and early 1800’s as a transportation means to expand the young Nation westward from Washington. However, the Canal quickly became obsolete when the railroads were introduced and built in mid-1800’s. Today the 250 mile (400 Km) Canal is abandoned except a few sections in the Washington area for recreational use including the original locks and mule-drawn boat. National Park Service also maintains the entire length of tow path for hiking and biking.