September 26 is National Public Lands Day, and the National Park Service is celebrating by waiving fees to all National Parks!
SF Maritime National Historical Park
Stand on the stern of BALCLUTHA, face west to feel the fresh wind blowing in from the Pacific Ocean. Located in the Fisherman's Wharf neighborhood, San Francisco Maritime National Historical Park offers the sights, sounds, smells and stories of Pacific Coast maritime history: http://www.nps.gov/safr/index.htm
Muir Woods National Park
When John Muir learned that William and Elizabeth Kent were naming a redwood forest near San Francisco in his honor, he declared, "This is the best tree-lovers monument that could possibly be found in all the forests of the world." The couple had purchased the land to preserve its beauty and restful wilderness; and in 1908, they donated it to the federal government to protect it from destruction: http://www.nps.gov/muwo/index.htm