This image shows the lights of Emeryville, San Francisco, and both spans of the Bay Bridge at night. If you look closely at the image in the larger size, you can even see the construction on the replacement bridge span, due to be finished around the time my kids start college.
Like some of the images of Point Reyes that I posted recently, this one is a thirty second time exposure (view the Exif data here).
Long exposures of the city night lack the subtle pleasures of night time in the country, but as their own reward show the many different color temperatures of different lighting sources, turn light-in-motion into lines and patterns (in the photo check out car headlights, helicopters, and so on), and give the eye much detail to get lost in.