Muir Woods National Monument
Walk beneath the impressive old-growth coast redwoods—the tallest living things on the planet—in this primeval forest that has been protected as a National Monument since 1908. There are six miles of trails, ranging from a half-hour loop to more challenging trails that cross over into the neighbouring Mount Tamalpais State Park. While the trails in the Muir Woods are suitable for strollers and wheelchairs, the unpaved upper trails are narrow and steep. Keep an eye out for bats roosting in the cavities of the giant redwoods—there are 10 different species in the wood.