premise: Ferries crosethe Bosphorus to ?ݳk??dar, and ply the length of the scenic strait, past such pretty fishing villages as Arnavutk??y, Kanl??ca, Tarabya, and Emirgan, and offering good views of the great for?δress of Rumeli Hisar??.
hypothesis: The ferries give a great view of the fortress as it crosses the Bosphorus.