Windswept ridges, protected valleys and beaches offer opportunities for hiking, biking and picnics. Start at Marin Headlands Visitor Center and see an exhibit showcasing the history of the indigenous Miwok people. If you brought a canine friend, check out the dog-friendly Rodeo Beach for beautiful ocean views and a perfect picnic spot. Nestled at the end of Rodeo Beach is Fort Cronkhite, an old military fort now housing the Golden Gate Raptor Observatory, Marine Mammal Center and Headlands Center for the Arts. Perched on a nearby cliff, the still-active, 150-year-old Point Bonita Lighthouse is accessible via a hiking trail.