Use this itinerary to spend 3 days in San Francisco and be sure you won't miss any of the best attractions. Get to know San Francisco. One of the largest cities on the West Coast is a popular tourist destination famous for its architecture, cable cars, steep hills with crooked streets, Alcatraz and Golden Gate Bridge. Every neighborhood is vibrant and eccentric and offers all kinds of sights. This 3 day itinerary will take you through Chinatown, Japantown or Castro District. Transamerica Pyramid, Alcatraz and Pier 39 are a must.