Get your bearings from the tower from most spots in the City --- " If you see someone with Sutro on a T-shirt you know they have intimate knowledge of the city."
sfgate.com/living/ Stature-of-Sutro-Tower-rises by Peter Hartlaub
In 1977 Don Herron began leading The Dashiell Hammett Tour now the longest-running literary tour in the nation. On this site you’ll find information on current walks — — plus his excellent hard-boiled blog with the latest on crime fiction and SF Noir
TOP TEN SF Tours --- #10 on this dynamic list is SS Jeremiah --the only original sea-worthy WWII vessel
yelp.com/search=free+tours Top Tours forSan+Francisco
Rated as one of SF's best guides a tour of hidden gardens iconic structures and historic trivia [Reservation required starts downtown]