Golden Gate Park
Golden Gate Park has over 13 million visitors every year, to enjoy and take in all the history and beauty this park has to offer. This park has a variety of things to do, they have almost everything from a Chinese tea garden to sports and bison feilds. For more information go to the official Golden Gate Park website.
Alcatraz Island
This historic island is one of the great places to visit while in San Francisco. Tours of the island are offeres both day and night time. If you are lookin for a little more crusis are also availdable.Day prices are Adult Price: $45.25 Children: $31.0 Seniors: $43.25 
and night prices are Adult Price: $52.25 Children: $34.50 Seniors: $49.25. Both tours last 2 1/2 hours, the night tour does come with more activites and more sight seeing.
Golden Gate Bridge
This 1.7 miles of steal and engeneering is a true sight to behold. The Golden Gate Bridge is 220 feet about the ocean and has side walks on both sides for a great view of the city and the ocean.