A subregion of the San Francisco Bay Area, North Bay consists of four counties and is the least populous urban region of the Bay Area located across the Golden Gate Bridge from San Francisco. North Bay is widely known for its scenic views of the Bay.
North Bay also contains some of the area's notable history. The Bear Flag Revolt took place in Sonoma, which is in North Bay. In addition, it is the location of the last of California's missions. General Mariano Vallejo, who was the last Governor's secretary before the United States annexed California, kept his home in Sonoma as well. It is now a National Historic Location. North Bay remained quite rural until well into the 20th century. When the Golden Gate Bridge opened in 1930, the area transformed from a farming area to an upscale suburb of San Francisco. During World War II, the addition of Travis Air Force Base gave the area its first major non-agricultural employer.
The North Bay area is connected to San Francisco by the Golden Gate Bridge. It is also connected to East Bay by the Richmond-San Rafael Bridge. There are also several ferry routes between San Francisco and North Bay. North Bay attractions include Sausalito, Bay Area Discovery Museum, Cavallo Point at Fort Baker, Marin Headlands, Muir Woods, and Tiburon.