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