The huge stone walls of the ancient Akkerman fortress, Belgorod-Dniester, Odessa region. Ukraine architecture castle landmark medieval old bastion tower brick building europe heritage history embrasure travel defense ages antique archaeology archeology architectural bessarabia bilhorod-dnistrovskiy citadel cultural dnestrovsky exterior fortification historical landscape location masonry middle monument ruin settlement shambles ukrainian european excavation national past armament bank belgorod-dnestrovsky construction defend detail loophole pictorial picturesque protect roof scenery stronghold timber view window dnistrovskyi outdoor summer estuary firth