Built on a hill overlooking the water, Rumeli Hisarı is the best preserved of all the fortresses on the Bosphorus and well worth a visit. Constructed in just four months in 1452, these eccentric-looking fortifications were ordered built by Mehmet the Conqueror directly across from Anadolu Hisarı, at the narrowest point of the strait. This allowed the Ottomans to take control of the waterway, and Mehmet and his troops conquered Constantinople the following year. The real
fun here is in climbing on and around the towers and crenellated walls, which offer fabulous views of the Bosphorus and the nearby Fatih Sultan Mehmet Bridge.
Yahya Kemal Cad. 42, Rumelihisarı, Istanbul, Turkey