If you need to take a break from all that exhausting sightseeing, get some fresh air and sunshine at 9 Lago della Ninfa. Bring a few snacks or a good book ... Whatever helps you unwind!
To visit this body of water, make tracks to Sestola. There are plenty of other things to see in the area, including Val di Luce, Cimone Sci, and Monte Cimone.