ancient akkerman fortress at belgorod-dnestrovsky, near odessa, ukraine

bilhoroddnistrovskyi belgoroddnestrovsky architectural fortification architecture archaeology historical monumental landscape structure akkerman fortress military monument historic landmark building oriental cultural belgorod exterior medieval ancient ukraine ottoman tourism vintage history antique culture citadel outdoor odessa castle period travel europe tunnel window temple unesco stone brick tower light retro fort wall arch town city rock ruin old sky