ancient architecture Bonaguil castle defend dordogne France french gatehouse high historical keep old power protection Remains secure security stone strength strong tower wall blue building color europe finland fortress grass green historic museum park roof round sky summer sunny white window arch archway defensive entrance home house lamp lantern path protect walls attraction cliff fountain hills imposing landmark landscape mountains Oban purple ruin ruins scotland scottish sunset brick tree background blockade bricks climb closed monument pattern stuck texture tile wallpaper animal battlement black domesticated England english farm feed fleece goat graze grazing Great Britain mammal pasture defence royal stronghold tourism tourist turret uk Windsor