A bit about my stay: I'm a young 50-something heading for Florence for 15 nights in January. I've found a private room/private bath via airbnb in the residential Oltrarno side of the Arno and will be studying with a chef for 4 of the days (learning how to perfect pizza al taglio for a business venture!). I've found a reasonable guide/translator to spend a few outings with (mostly to chat with pizzeria al taglio workers, if they will have me?)...it's my 5th trip to Florence, but the last was 20 yrs ago and prior trips were for 2-4 nights, so I had little time to explore.
Questions/seeking input: What day trips should I consider? I'm a foodie, so Bologna? I've been only for a day there 25 yrs ago! Other easy to navigate cities to visit? I'd prefer the fast train with not more than a few hours round trip/day trip...and don't plan to rent a car, so day trips will be on foot or by cab/uber.