Modern metal footbridge over Manzanares River in Madrid, Spain. Pedestrian, River, architecture, arganzuela, art, blue, bridge, building, city, design, engineering, europe, famous, footbridge, futuristic, geometry, landmark, landscape, madrid, madrid rio, manzanares, metal, modern, park, perrault, promenade, rio, sky, spain, spiral, steel, structure, tourism, travel, urban, walkway