President Dwight D. Eisenhower's retirement home, a working dairy farm just south-west of the Gettysburg battlefield. The 1950s Pennsylvania farmhouse is preserved almost exactly as the Eisenhowers left it, complete with their books, Ike's painting studio, Mamie's dressing room, and a TV set always tuned to whatever channel was getting Ike worked up.
Access is by shuttle bus from the National Military Park Visitor Center; tickets sold there. The farm tour takes about two hours. The Angus cattle pastures and the views of the South Mountain range are an unexpectedly pastoral coda to the battlefield.