yoros castle istanbul karadeniz

anadolu ancient archaeology archeology architectural architecture bastion bosphorus bosporus bricks brickwork building byzantine castle city climb conquer conservation construction empire entrance epoch fences fort fortress garrison genoa genoese heritage hill historic historical history istanbul kalesi kavagi landscape layers lookout masonry medieval monument nature old ottoman path portal protection rampart rock round ruins scenic shipping sights sightseeing stonework strait stronghold structure symmetrical symmetry tourism tourist touristic tourists tower town track trail transportation travel trip turkey vessel wall yoros