The Raticosa pass is stunning and a must if you are visiting Tuscany, e.g. for Mugello GP.
It is a minor road full of switchbacks through the Appenines between Bologna and Firenze . At the weekend it is full if mad Italian bikers treating it like a racetrack, and there is a cafe at the top with fab views. Quite a long ride but well worth it. The surface is mainly very good.