medieval fort dating since roman empire settled on bank of danube

ancient attraction battle battlement blue build building castle cloud crenel danube dating defensive destination empire estate famous fence fort fortification fortress golubac grass green greenery historic historical history landmark material medieval middleage monastery monument nature old parapet parapetto pathway pavement plateau rampart riverbank rock rocky roman romania ruins scenery serbia settled shape sky spring stairs stairway stone summer sunny surround temple terrace terrain thick top tour tourism tourist tower towers travel tree trip vacation village voyage walk wall walls wooden