Also called "the City by the Bay", it's located in the north of California, US. I went there four years ago, during a three week road trip with my family across California. I'm going to tell you here what I thought of this city, what impressed me and what you absolutely must do if you go there!
So, I went there during August, but, surprising , the weather wasn't so good: it was cloudy, very windy and we also had some rain. What a change when we came from very sunny Palm Springs and its 45°C!
The first thing that I noticed was that the almost constant fog over the Golden Gate bridge was not only a legend: it was just impossible to see SF when we were on the other side of the bridge!
One of the absolute “must do” is to take the cable-car to reach the heights of the city: the view over San Francisco and the island of Alcatraz (which is an old prison) is absolutely fantastic!
We also visited the different multicultural districts like Mission, Chinatown and also the famous gay neighbourhood called Castro. I admired the fact that all these different cultures lived together without much tension within the same city.
A few weeks after my trip, the international rally driver Ken Block performed a new video with his prepared Ford Fiesta in the streets of San Francisco, here's a link to the video: