The 4th grade California Mission experience is a state right of passage and it would be hard to beat the introduction to that world offered by the rangers at San Juan Bautista State Historic Park.
But the reality is that it was built within spitting distance of houses that were far better adapted to the local climate, but which the anglos were unable to build -- the adobe homesteads of the Spanish and Mexicans. It's hard to believe that the building below is actually older than the one above, but it is. Plus it was cooler in the summer and warmer in the winter, unlike the picturesque but non-insulated and hole-ridden cabin.
It's interesting to wonder why the anglo settlers settled on a such an inferior building style. Could they not afford adobe (which is just made from clay and cow manure, after all)? Maybe they didn't realize what was better. Or perhaps no-one would tell them. Or were were they afraid, or too proud, to ask?