Known (erroneously) as the "crookedest street in the world," this whimsically winding block of Lombard Street draws thousands of visitors each year (much to the chagrin of neighborhood residents, most of whom would prefer to block off the street to tourists). The angle of the street is so steep that the road has to snake back and forth to make a descent possible. The brick-lined street zigzags around the residences' bright flower gardens, which explode with color during warmer months. This short stretch of Lombard Street is one-way, downhill, and fun to drive. Take the curves slowly and in low gear, and expect a wait during the weekend. Save your film for the bottom where, if you're lucky, you can find a parking space and take a few snapshots of the silly spectacle. You can also take staircases (without curves) up or down on either side of the street. In truth, most locals don't understand what the fuss is all about. I'm guessing the draw is the combination of a classic, unusually steep San Francisco street and a great photo op. FYI: Vermont Street, between 20th and 22nd streets in Potrero Hill, is even more crooked, but not nearly as picturesque.