The old Spanish mission at San Juan Bautista sits just next to a small escarpment, and if you didn't know better, you probably wouldn't realize that the San Andreas Fault caused the little uplift in the earth's crust. A historic marker and geological exhibit call attention to what lies below the plowed field nearby. Surprisingly, the old adobe-brick Spanish mission building has been used continuously since 1812 and has never been toppled by an earthquake. However, in October 1798, the shaking was so bad that the missionaries slept outside for the whole month. There were as many as 6 tremors in one day, making huge cracks in buildings and in the ground.
Find out more about visiting San Juan Bautista and about Mission San Juan Bautista.