A general overview of Istanbul and its beauty. The most visited area in town is Sultanahmet, a peninsula (known as Sarayburnu) overlooking the Bosphorus, the Golden Horn and the Sea of Marmara. Rich in history, it is the home of Topkapı Palace, Hagia Sophia), the Blue Mosque (Sultan Ahmet Mosque), Yerebatan Basilica Cistern, and the Hippodrome.