Go San Francisco Card: Sells a card that provides free admission to 30 attractions, plus discounts at shops.Mr Treasure Hunt: Helps visitors explore neighborhoods through "urban treasure hunts" that involve solving clues.San Francisco Convention & Visitors Bureau: A comprehensive source for visitor info with features for leisure and business travelers, convention planners, travel trade, travel media and Bureau members.Wok Wiz: Walking tours and food tours of San Francisco's North Beach and Chinatown.