San Francisco means so many things to so many people--a superlative in terms of the kinds of activity and diversity engendered in the most beautiful city in the world.
Affectionately known by locals as "The City" by the bay, it's unique topography and eclectic skyline lends a vertical appearance to a dynamic landscape, containing the world's most treasured examples of architecture--Transamerica Pyramid, Bank of America Center, Ferry Building,
Golden Gate Bridge, et al.
Akin to Paris and London, San Francisco offers
something special for those living--or visiting--in the area, leaving an indelible impression to come back for more:
Financial District, Fisherman's Wharf, Alcatraz Island, Union Square, Chinatown, Japantown, etc.