Check out the Bay Model! The U.S. Army Corps of Engineers Bay Model is a working hydraulic scale model of the San Francisco Bay and Sacramento-San Joaquin River Delta System.
Rodeo Beach is a beautiful pebbly beach that John and Annika have visited countless times over the years. Down the hill from Battery Townsley and nestled between Fort Cronkhite, and the Marin Headlands Visitor Center, Rodeo Beach is a great place to start a day's visit in the Headlands. Also a stone's throw from Sausalito.
If you are looking for an easy, hour or so hike through CA coastal native plants and wildflowers, and a (chilly) dip in the ocean, check out Tennessee Valley Trail.
Highly recommend grabbing a bite at Souvla, the Greek eatery, or breakfast at Rustic Bakery, and take a stroll through their open air shopping "village" right on the bay.
If you’re looking for a kid friendly activity, we highly recommend this! Both Annika and John have fond memories of visiting the museum as children. Also it’s next to Travis Marina, the reception location!