Drive up to the Franconia Notch area is an absolute must. You can search around to pick a small hike depending what you're comfortable with. Artist's Bluff is a major scenic one that's a nice short hike. I'd do that, and hit the kanc (note: this is a scenic highway, but not strictly about driving, more like a lot of stops where you walk around for a few minutes to see the views) in the same day.