If your trip to San Francisco is all locked in but your itinerary is looking a bit empty, we can give you a few hints and tips.You may need to ask the boss for an extra week off, because San Francisco is bursting at the seams with unmissable sights and landmarks. First to be checked off your list should be Lombard Street and Pier 39. You won't want to miss University of San Francisco and Palace of Fine Arts either.Experience the best that this city has to offer by adding Westfield San Francisco Centre and San Francisco Museum of Modern Art to your to-do list. If you've got some spare time, take a look at TransAmerica Pyramid and Asian Art Museum of San Francisco as well.Close to the center, Orpheum Theater is one sight you might like to consider putting on your must-see list. San Francisco City Hall and Bill Graham Civic Auditorium are also a stone's throw away and worth a detour.