 The Piper Aviation Museum exhibits aircraft and aircraft equipment , documents , photographs , and <unk> related to Piper Aircraft . An eight @-@ room home , the <unk> House , restored to its mid @-@ 19th century appearance , displays Victorian @-@ era collections ; it was added to the National Register of Historic Places in 1972 and is home to the Clinton County Historical Society . The Pennsylvania Historical and Museum Commission has placed three cast aluminum markers — Clinton County , Fort Reed , and Pennsylvania Canal ( West Branch Division ) — in Lock Haven to commemorate historic places . The Water Street District , a mix of 19th- and 20th @-@ century architecture near the river , was added to the National Register of Historic Places in 1973 . Memorial Park Site <unk> , an archaeological site of prehistoric significance discovered near the airport , was added to the National Register in 1982 . 
