You don’t need to be a car or plane buff to enjoy this museum, though it helps. Founded in 1974 and located 3 miles south of Rockland on Route 73, the museum has an extraordinary collection of cars, motorcycles, bicycles, and planes, nicely displayed in a tidy, hangarlike building at the edge of the Knox County Airport. Look for an early Harley Davidson motorcycle and a sleek Rolls-Royce Phantom dating from the roaring 20s.