Ключевые слова: architecture, autumn, baltic sea, blue, boardwalk, drone, ecological, ecological trail, ecology, footpath, forest, green, lake, lakhta, landmark, landscape, leningrad, leningrad oblast, national, outdoor, panorama, park, pathway, petersburg, pristine, razliv, reserve, resort district, road, russia, sestra river, sestroretsk, sestroretsk swamp, siestarjoki, st petersburg, street, suburb, summer, swamp, tour, tourism, town, track, trail, travel, urban, view, walk, wooden,