Two very old towers. The first one, Kız Kulesi, was a 12th century custom station for ships travelling on the Bosphorus. The second, Galata Kulesi, is a 14th century watchtower, that features a broad view with most of Istanbul in sight.
Pictures taken from the coast of Istanbul's Asian side.
Helios 44-2 58mm f/2 lens and Minolta 500mm f/8 mirror lens, Sony α77 camera.