The Golden Gate National Recreation Area is one of the most visited National Parks in the United States, hosting over 13 million visitors per year. It is also one of the largest urban parks in the world with a size rivaling the urban areas of Marin, an affluent Bay Area county. More than 80% of its size is devoted to wild or open lands. This tour of the GGNRA units within Marin County includes Muir Woods, Olema Valley, Bolinas Lagoon, Fort Baker, and the incomparable Marin Headlands - with its breathtaking views of San Francisco and the world famous Golden Gate Bridge.