St Louis, architectural landmarks, daytime, sunny, blue sky, white puffy clouds, Gateway Arch, grand staircase, monument valley, ornate iron fence, historic buildings, red brick roads, horse-drawn carriages, old street lamps, Cathedral Basilica of St. Louis, Romanesque Revival style, stained glass windows, intricate stone carvings, Citygarden, fountains, walking paths, botanical gardens, sculptures, modern skyscrapers, city hall, clock tower, 3/4 composition, low-angle shot, warm lighting, vibrant colors.