The turn around point when walking the Bay Walk at Chrissy Field is Fort Point, located right under the bridge. On my walk today I came upon this very serious reenactment of a time in the 1800s when this Fort was active.
Generally the place is closed so today was a delightful, if not particularly well attended, exception.
Here is some data about Fort Point ~
Fort Point has stood guard at the narrows of the Golden Gate for nearly 150 years. It has been called “the pride of the Pacific,” “the Gibraltar of the West Coast,” and “one of the most perfect models of masonry in America.” When construction began during the height of the California Gold Rush, Fort Point was planned as the most formidable deterrence America could offer to a naval attack on California. Although its guns never fired a shot in anger, the “Fort at Fort Point” as it was originally named has witnessed Civil War, obsolescence, earthquake, bridge construction, reuse for World War II, and preservation as a National Historic Site.