Arwen O.
Yelp
A wonderful collection of historic buildings and gardens in Monterey, including the Custom House (from back when Monterey was the commercial and cultural capital of Mexican Califoria), the house where Robert Louis Stevenson lived, the Sherman quarters (who knew Sherman made himself unpleasant out west, too?), California's first theater, and a bunch of other beautifully preserved adobe houses (and the first brick house, quite a big deal at the time!).
Unfortunately, my mom and I didn't get our acts together until our last day in Monterey, but the houses we visited were wonderful. The Cooper-Molera adobe house (home of the Cooper Museum Store) is a grandiose Victorian adobe, with amazing original wallpaper and meticulously reproduced carpets. You'd never guess the building was adobe except for the extremely deep window wells and the thick walls between rooms, carefully paneled with wood to disguise their origins. The gardens out back are in pretty good shape, complete with two sheep in the animal shed, and a gorgeous orchard.
My favorite building was Casa Soberanes, which is an older and more spartan building (it's subsequent owners were devoted to keeping its original character intact), and the whitewashed adobe walls and wonderful mix of early new england, imported chinese, and mexican folk pieces make the early 19th century cultural mix extremely vivid. The garden borders are made from buried bottles and whale bone, and the bright blue garden door was apparently a signal to suitors that there was a marriageable daughter in the house.
The tour guides are totally passionate about the history and families of the houses (perhaps bordering on psychosis, but whatever, it makes for an interesting tour). Check for tour times, because there is usually only one tour a day, and the houses are closed the rest of the time (although the gardens are open). Tours are free, but consider donating some money anyway because the park is clearly an act of love.