Downtown San Francisco, seen from Twin Peaks,Golden Gate Bridge-longest suspension bridge span in the world ,Alamo Square-San Francisco's famous square bordered by Victorian Houses,Alcatraz Island Prison-part of the Golden Gate National Recreation Area and now used as prison,Fisherman Wharf-sea lions are awesome ,Lombard Street-famous for having a steep, one-block section that consists of eight tight hairpin turns,Aquarium of the Bay-is focused on local aquatic animals from the San Francisco Bay,San Francisco Zoo-Houses 250 species and includes a children's zoo, http://www.joguru.com/san-francisco-united-states