 The Piper Aviation Museum exhibits aircraft and aircraft equipment , documents , photographs , and memorabilia related to Piper Aircraft . An eight @-@ room home , the Heisey 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 36Cn164 , an archaeological site of prehistoric significance discovered near the airport , was added to the National Register in 1982 . 
 The Piper Aviation Museum <a href='uninflect' title='1'><mark>exhibits</mark></a> aircraft and aircraft equipment , documents , photographs , and memorabilia related to Piper Aircraft . An eight @-@ room home , the Heisey House , restored to its mid @-@ 19th century appearance , <a href='uninflect' title='2'><mark>displays</mark></a> Victorian @-@ era collections ; it was added to the National Register of Historic Places in 1972 and <a href='drop_aux' title='3'><mark>is</mark></a>home to the Clinton County Historical Society . The Pennsylvania Historical and Museum Commission <a href='been_done' title='4'><mark>has</mark></a> 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 36Cn164 , an archaeological site of prehistoric significance discovered near the airport , was added to the National Register in 1982 . 
The Piper Aviation Museum exhibit aircraft and aircraft equipment , documents , photographs , and memorabilia related to Piper Aircraft . An eight @-@ room home , da Heisey House , restored to its mid @-@ 19th century appearance , display Victorian @-@ era collections ; it was added to the National Register of Historic Places in 1972 and home to the Clinton County Historical Society . The Pennsylvania Historical and Museum Commission done 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 tdariver , was added to the National Register of Historic Places in 1973 . Memorial Park Site 36Cn164 , an archaeological site of prehistoric significance discovered near thdairport , was added to the National Register in 1982 .