GOLDEN GATE BRIDGE
The Golden Gate Bridge is without a doubt the most well known emblem of San Francisco. Walking or biking across the bridge is a great experience, with incredible views from both sides. Start at the Bridge Pavilion, which offers a gift shop, historical information, and exhibits, including the original twelve-foot stainless steel Bridge "test tower" from 1933. If you want a guided tour, you can sign up for a free one most Thursdays and Sundays with SF City Guides.
Source by: http://www.msn.com/en-us/travel/budget/top-25-free-things-to-do-in-san-francisco/ss-BBloaKM#image=12
