Architecture, City, Skyscraper, Outdoors, St. Louis, Gateway Arch, Missouri, Urban Skyline, River, Waterfront, Blue, Building Exterior, Built Structure, City Life, Cityscape, Dusk, Famous Place, Horizontal, Illinois, Illuminated, Midwest USA, Mississippi River, No People, Photography, Purple, Reflection, Street Light, Sunset, Travel Destinations, USA, arch, stream, united states, direction, waterfront, city district, sundown, demonstration, blue, district, purple, illinois, state, United States of America, America, nightfall, photography, american state, dusk, U.S., United States, cityscape, horizontal, twilight, reflection, north american country, sunset, missouri, river, expression