cityscape at fisherman's worf in downtown coastal san francisco california with alcatraz island in background

christmas business beach design water house nature office construction usa architecture california tower cityscape tourism travel america sky landmark urban francisco skyline city famous landscape modern tourist vacation night dusk downtown scenic building sunset view evening aerial financial bridge exterior bay united states transbay silicon valley cloud sunrise outdoors skyscraper dawn fisherman's worf coastal alcatraz island background background mountains ocean historic districts midday sunlight