Ключевые слова: activities, architecture, buildings, city, cityscape, clouds, cloudy, cultural, culture, day, destination, environment, exploration, foliage, green, heritage, historic, history, horizon, landmarks, landscape, nature, neighborhoods, outdoor, panoramic, parks, petersburg, river, rooftops, russian, scenic, sightseeing, skyline, spaces, spring, tour, tourism, tours, travel, urban, view, waterfront, waterways,