Gelateria dei Neri is situated on Via dei Neri just a stone's throw from Piazza di Santa Croce in Florence. It's an area of town you're likely to explore at some point, and when you do, it's worth stopping in at this gelateria to sample their offerings. They have a wide range of flavors, including some dairy-free options, and will let you try before you buy; the pistachio is very good. It's all fresh and made in-house, and the prices are reasonable, given where the shop is. The interior is clean and modern, with plenty of seating if you'd rather eat inside than on the street.