Pennsylvania's 3,213' Mount Davis is its highest point. There is a tower on the summit. There is some information here.
Quote: Aaron Williams, 6, is king of all he surveys while standing atop a brass map of the terrain 50 feet below him at the summit of Mount Davis -- the highest point in the state. Aaron climbed the tower, and the map, while on an outing with his sister, Ellen Carlson. They are from nearby Summit Mills, Somerset County.