Muir Woods is a national monument located in Marin County, California, known for its towering ancient redwood trees. Established in 1908, it protects a 554-acre area of coastal redwood forest, showcasing trees that can reach heights of over 250 feet and live for more than a thousand years. Visitors to Muir Woods can explore a network of trails that wind through the serene forest, offering opportunities for hiking and wildlife observation. The monument is part of the Golden Gate National Parks and attracts nature lovers and tourists seeking to experience the beauty of these majestic trees.