From idyllic seaside oyster bars to hidden tank museums and spectacular twisting roads, California's Marin County, just across the Golden Gate Bridge from San Francisco, offers a feast of dazzling sights and world-class driving. With help from our friends at the California Highway Patrol, who temporarily shut down some of Marin's choicest two-lane roads, host Arthur St. Antoine guns the thrilling, Formula 1-inspired McLaren 12C Spider at full throttle-soaking up the scenery, the sunshine, and secret gems you won't want to miss.