On your third day - it depends on how much time you have of course – you could start from Piazza Santa Croce and visit the spellbinding Basilica before crossing the Ponte alle Grazie and turning left into the Lungarno Serristori in order to admire the city from a different perspective.
If you have plenty of time, we recommend you take the steps from Piazza Poggi up to the Piazzale Michelangelo, enjoy one of the most famous postcard panoramas and visit the Church of San Miniato (6 minute walk) with its beautiful Cimitero Monumentale delle Porte Sante.
If you can spend the afternoon in Florence then take Via del Monte alle Croci and follow it through until you find the Rose Garden on your right (a walled, terraced garden with panoramic view), take a look inside and have your lunch (+ a good glass of wine) just past the Porta San Miniato, in the San Niccolò neighborhood.
Other interesting sights in the immediate surroundings are: the Bardini villa/garden and museum, the Belvedere Fortress and the Arno promenade alongside the river.
We hope you will find these tips useful and enjoy your time in Florence, always remember to take your time and never simply check things off your must-see list. This 3-days itinerary is also very flexible and can be modified and adapted to suit your interests and needs.