House Of Air

Free one-room visitor centre by the beach with tide-pool tanks and whale bones. Ten minutes, and a good excuse to be indoors for a moment.

A small weekend museum in a former Army school, with a reconstructed classroom and personal stories from Japanese American soldiers.

A park good for picnicking, with old military batteries and camping spots to explore.

A brick fort tucked directly under the Golden Gate Bridge. Free, echoing spiral staircases, cannons to climb near, and the bridge roaring overhead.