This is the world above Istanbul.
In the old city of Sultanahmet the streets are thrumming with tourists and markets and restaurants and vendors at most times of the day or night. This lively ground level is replicated up in the sky, where every hotel jostles to have the highest roof terrace with some view of the minarets and the sea. This roofscape is the world that tourists inhabit for breakfast and dinner and sundowner drinks, and perhaps reach a vague nodding acquaintance with their counterparts on the adjacent roof terraces.
This was the view from our particular terrace one beautiful dusk in autumn last year. That's the Blue Mosque in the background, just a few minutes walk away. A benefit of staying this close to the Blue Mosque (apart from it being one of the great buildings of the world, of course) was waking every morning to the beautifully evocative call to prayer. There are apparently some 3,000 mosques in Istanbul and it's quite impressive when they all start the call just before dawn. It makes you remember that you are somewhere very exotic and far from home from the moment you wake up each morning.