rumelihisari bogazkesen castle, rumelian castle, located at the hills of the european side of bosphorus strait, istanbul, turkey

ancient antique architecture asia attraction bogazkesen bosphorus bricks castle citadel city day empire europe european famous fort fortification fortress heritage hill hills hisari hissar historic istanbul landmark landscape located medieval mountain old ottoman roumeli ruin rumeli rumelian rumelihisari sea side sky stone strait sunny tourism tower travel tree trees turkey turkish view wall watchtowers