Ключевые слова: architecture, barrels, boat, boats, bridge, city, cityscape, dom luis i bridge, douro, douro river, europe, european, gaia riverfront, historical, history, landmark, marginal de gaia, old, port wine, porto, portugal, portuguese, river, riverfront, sailing ship, scenic, ship, sky, tourism, tourist, town, traditional, transportation, travel, urban, view, vila nova de gaia, water, wine,