A great way to see a city. The tour we took was an hour around the city in the middle of the day, with temperatures around 38C / 98F. We were upstairs on an open-topped bus (you don’t see much sitting downstairs). Fortunately we managed to get 2 seats at the back, under the shade of the almost completely rolled-back canvas roof. Those in front of us enjoyed the sunshine.
The tour took us through the city streets and up into the hills above the city for a magnificent view over Florence: