The world’s most famous grove of virgin redwoods, Muir Woods National Monument forest is full of trees that are 400-800 years old and grow to more than 250 feet high, as well as a plethora of other wildlife. Activities include a leisurely (wheelchair accessible) hike alongside a salmon-filled creek. A Muir Woods shuttle runs on weekends and holidays during peak season, with pickups in Sausalito and Shoreline Highway. Open daily 8 am-sunset. $7, ages 16 and under free.