Lombard Street is quite an uncommon avenue; due to its famous hairpin turns, it's probably one of the most photographed streets in the world. Along with the Golden Gate Bridge and the Cable Car, that's one of the SF's must see.
You can bring a trip to Lombard Street and a Cable Car tour together to have (in our opinion) the best Lombard Street experience: to do so just take the Powell-Hide Line from Market Street terminal, take off at Hyde St & Lombard St and you will be in the highest part of Lombard Street, where you will enjoy a breathtaking view of San Francisco and its Bay... unsheathe your cameras for some astonishing pictures!.