Gateway Arch, St Louis, Missouri, modern architecture, iconic 630ft tall stainless steel monument, evening golden hour lighting, subtle mist rising from Mississippi River, lush greenery surrounding, walking tourists in casual summer clothing, some taking photos, others relaxing on benches, Citygarden in background with vibrant flowerbeds, distant skyscrapers and buildings of St Louis, clear blue sky with few puffy white clouds, soft focus, shallow depth of field, cinematic composition.