The Bosphorus or Bosphorus is a narrow, natural strait and an internationally significant waterway located in northwestern Turkey.

Istanbul’s Hagia Sophia, or Aya Sofya (Turkish), is the former Greek Orthodox Christian patriarchal cathedral, later an Ottoman imperial mosque and now a museum (Ayasofya Müzesi) in Istanbul, Turkey.

Sultan Ahmed Mosque (Turkish: Sultan Ahmet Camii), also known as the Blue Mosque, is a historic mosque located in Istanbul, Turkey.