Denver, Colorado, urban landscape, historic buildings, modern skyscrapers, Larimer Square, Union Station, Civic Center Park, Rocky Mountains backdrop, sunny day, blue sky, few white clouds, afternoon light, warm atmosphere, people walking, cycling, vibrant street art, eclectic mix of old and new architecture, Art Deco, Victorian-era, Neoclassical styles, ornate details, intricate stonework, grand entrances, columned facades, glass and steel skyscrapers, rooftop gardens, bustling streets, pedestrian zones.