Ключевые слова: architecture, blue, bridges, building, buildings, city, cityscape, cologne, commercial, day, daylight, daytime, deutz, europe, german, germany, hyatt, hyatt regency hotel, koeln, koln, kolntriangle, modern, observation, promenade, regency, rhein, rhine river, rhinewestphalia, river, scenics, sculpture, shore, sky, skyline, skyscraper, staircase, state, stone, street, summer, sunlight, tourism, tower, town, travel, travel destination, urban, water,