I tend to be more of a mountains person so anywhere in northern PA all through upstate NY is beautiful country. Lots to see and enjoy with nature. As mentioned, if you are into history Gettysburg is worth the visit. Also, for a total change and something different than you may be used to, central PA is Amish country. Especially the Lancaster county area. Sometimes its enjoyable to be around that area, hit some Amish farm stands and markets and see things a bit different. Harley tour in York PA is a fun thing for a few hours.