I believe that the tallest man-made structures in Turkey are the mast of Polatli longwave transmitter ( http://www.wikimapia.org/#lat=39.756…4&z=16&l=5&m=b ) and that of Bafa VLF transmitter ( http://www.wikimapia.org/#lat=37.411…7&z=15&l=5&m=b ), but there are no information on the height of them available. Perhaps one can find it out by using http://www.ans.dhmi.gov.tr/tr/AIP1/main.html . However a registration, which is obviously not online possible is required.