The spa of Hotel Grifone, near the Arno east of the centre, has a sauna, a Turkish bath, a Himalayan salt room, two emotional showers, a relaxation area with herbal teas and a large heated whirlpool pool (6 by 4 metres) under a cover that keeps it usable in winter. Access costs €20 per person for 90 minutes, shared with other guests, towel and slippers included; book by email or phone.