vienna, austria, tower, places, places of interest, landmarks, danube, danube river, architectural, buildings, concrete, trees, withered, green, grey, field, skies, dc, national capital, stream, sky, seat, District of Columbia, city, district, edifice, district of columbia, woody plant, european country, capital, plant, spot, urban area, gas, building, gray, center, column, tree, federal district, landmark, river