3) Fort Point National Historic Site.
This site has special historical significance. Its original intent was to prevent invading forces from entering San Francisco Bay. By the end of the Civil War the massive cannons that had been used for this purpose were obsolete. The last of the original 126 cannons was removed around 1900. During the 1930’s, the fort was used as a headquarters for the building of the Golden Gate Bridge. This Fort has played a vital role in our history and is worth a visit, especially considering the fact that it is free.