Kadikoy's a huge district on the Asian side of Istanbul with a population of about half a million people, but it's got a fairly compact centre occupying the area around the ferry port and up the hill towards the upscale Moda .
Istanbul, Turkey: The Crossroads of Europe and Asia. Sea of Marmara at the bottom, Bosphorus Strait, going to Black Sea at the top. We took a boat trip up the Bosphorus. The best part was seeing the beautiful giant (wooden?) villas on the European side.