San Francisco architecture walking tour, daytime, sunny, clear blue sky, iconic buildings, ornate details, columns, arches, Victorian homes, Painted Ladies, steep hills, scenic views, cityscape, fog rolling in, Golden Gate Bridge, Alcatraz Island, Lombard Street, Chinatown, Union Square, cable cars, tourists, walking, camera, map, sunglasses, casual outfit, comfortable shoes, urban atmosphere, vibrant colors, warm lighting, cinematic composition.