Freya M. on Fort Mason
I went when I was a kid on a school field trip and it's an endurance thing.
A really good experience and one of the best way to catch some fresh ocean breeze. If you take it all the way you could end up at Exploratorium. The walk along the coast and pass the sailboats was magnificent, also a great way to have breakfast at the open Market. If you decide to continue along the coast you'll end up at the Fort below the Golden Gate Bridge that's very interesting as well. This walk path is a must see.
Note: There's no cost to park or walk. No trashcans, restrooms or drinking fountains.