Explore istanbul on a full day cruise along the bosphorus strait and the waters of the black sea with an onboard guide learn about istanbul and enjoy three stops to discover some of the landmarks see where the citys ottoman era sultans spent summer vacations at ortaky and rumeli hisar fortress and take a tour of kksu palace one of the citys gems swim in the black sea at the coastal village of poyrazky or explore the medieval ruins of anadolu kava an onboard lunch featuring turk