When the afternoon sun shines on the hillsides or the fog rolls in from the Pacific Ocean over the Golden Gate Bridge, this breathtaking city has a mystical beauty. Almost every neighborhood of San Francisco features iconic postcard scenes, from the curves of Lombard Street to the rows of fanciful Victorian houses and the marvelous bay views. San Francisco packs an incredible number of tourist attractions into just seven by seven square miles. It's a small, walkable city as long as you don't mind hiking up steep streets or hopping on a cable car. Go on a self-guided walking tour through the city's most atmospheric neighborhoods, which are packed with famous tourist sights.