If there's only one off-the-beaten-path thing you do while in SF, make it this. Start at the base of the Moraga steps on the west side and prepare for a very long, but oh so scenic, climb. Picturesque views along the entire way up. Keep going up the wooden stairs to the very top and you will find yourself looking at my favorite views of the city, North Bay, and Pacific Ocean. Usually not more than 2 or 3 other people there, tops, and bring a windbreaker.