1) Golden Gate Bridge.
This is a favorite among tourists for many reasons. One of those reasons is the fact that it is one landmark that belongs only to San Francisco. It is uniquely a part of this city and represents, for many, your entire trip. Another reason is that there are so many ways to get there. I recommend walking and if you’re up for it, try one of the guided walking tours-this will provide valuable background information about the bridge as well as insuring that you don’t get lost on the way.