America, American, Architecture, Autocar, Automobile, Barrier, Boundary, Bridge, Bridges, California, Car, Cars, City, Construction, County, Flag, Flags, Foundation wall, Golden Gate, Golden Gate Bridge, Leisure, Marin County, Motor car, North America, Outdoor, Protection, Recreation, Retaining walls, San Francisco, San Francisco Bay, Span, States, Structure, Suspension, Tourism, Tourist, Transport, Transportation, Travel, US, USA, United States, Vehicle, Wall, Walls