Istanbul is a city which you´ll never forget. For me it was quite challenging, because I traveled there for a job, which got canceled when I arrived in Istanbul.
So I had to rebook my flight back home, but I managed to stay in Istanbul for an extra day to see a little bit of the city.
I can tell you, one day is way too short. If you are planning to see the city take some days and relax. A super nice, varied, and huge city.
Leica SL (Typ 601) // Leica APO-Summicron-M 50mm f/2 ASPH