Ключевые слова: beautiful, biosphere, boat, boat trip, branch, canal, channel, danube, danube delta, delta, environment, europe, green, idyllic, lake, landmark, landscape, natural, nature, nautical, navigation, outdoor, peaceful, reflection, reserve, river, romania, rural, scenic, sky, sulina, summer, tourism, transport, travel, vacation, view, water, watercourse, wild,