Platt Hill State Park is an undeveloped public recreation area occupying in the town of Winchester, Connecticut. The state park offers scenic views, hiking, and picnicking.HistoryThe park was one of several public recreation areas acquired in the 1950s using funds bequeathed for that purpose by George Dudley Seymour. The park first appeared on state rolls in the 1960 edition of the Connecticut State Register and Manual, where it was reported as having.