The Bebek district, on the Bosphorus, was a fashionable place to live during the 18th and 19th centuries with over 40 coastal palaces and gardens.
Today, Bebek is still one of the most desirable parts of the city in which to live, but it is also a beautiful place for a stroll. You can get there by ferry or it’s a 5km walk from Ortakoy.
Rumeli Castle (Rumeli Hisarı) is an Ottoman fortress dating back to 1452. It was built by Ottoman sultan Mehmed II (Mehmed the Conqueror) in preparation for the conquest of Constantinople. The castle is on the shore of the Bosphorus Strait at its narrowest point of approximately 660 meters.
It is just opposite Anadolu Castle (Anadolu Hisarı) which is another Ottoman castle built in 1394 by Bayezid I. Both Anadolu Castle and Rumeli Castle were built by Ottoman sultans in order to prevent military and economic aid to the Byzantine Empire coming from the north, via the Black Sea. Thus, the Bosphorus Strait connects the Black Sea with the Marmara Sea.