Pictures of graffiti art and city life photos offer a great array of photo opportunities. Check out this excellent article on street photography.
San Francisco Cable Car
© Kathy HarrisStradum, Dubrovnik HDR
© Michael McCookSousse, Tunesia
© Per KildeagerVictoria
© Bob J. BoehmLong Beach city skyline at dusk, CA
© Linda EodiceSan Francisco Police
© Rony Sagy