Sunday, March 2, 2014
Where
Fort Cronkhite
Cost
Free
Long closed to public access, Battery Townsley in the Marin Headlands has been refurbished and is now open to visitors the first Sunday of each month.
Come explore this labyrinthine fortification, and learn about San Francisco's most extensive -- and most secret -- World War II military fortification.
From 1940 to 1948, it mounted two massive battleship guns and housed more than 100 soldiers in an extensive network of underground tunnels; during the Cold War, it was used as an underground research facility.
If You Go
Stay overnight at the historic Marin Headlands Hostel.
More Info
