stairs of the walls of the castle of saint george in lisbon that go down the hill that lead to martim moniz square with aerial

lisboa cityscape above castelo sao jorge castle walls central lisbon defensive europe fort fortification fortified fortress from hilltop historic historical portugal medieval panorama portuguese rock stairs roofs rooftops saint george skyline square staircase city stairway stone stronghold tower walkway watchtower aerial view alfama architecture birdseye colored houses downtown hill neighborhood street top down town that lead martim moniz views lisbon portugal