In Italy at the moment taking a short break. We went to the opera at the roman amphitheatre in Verona last night. In the cheap seats you have to arrive an hour or two early to get a good position so we had quite a while to look around before the opera started. When you walk round the top of the arena you are level with the roof line of Verona and get to see some lovely roofs created at the top of these buildings.
This was the best one but the position of the sun made it very hard to get a good photo.
Maybe it will look better full screen on a computer than it does on my phone. This one was quite nice too and much easier to photograph.
I should think their main purpose is to provide somewhere cool for the residents to hide from the heat. However they still provide much needed biodiversity in the city and even soaked up some of the run off from the rain that ended our opera after the first two acts.