Luther Burbank Experimental Farm before heading back to SF. This farm is always a peaceful respite before returning to the highway. Here's a little about Luther from the website link above.
"Luther Burbank bought his 15-acre farm on Gold Ridge in 1885 in Sebastopol. During his career he introduced over 800 varieties of fruits, flowers, vegetables, and grains. He developed many of California's plums and prunes, the ancestor of the Idaho Potato, the Shasta Daisy, and novelties such as Plumcots, Thornless Blackberry, and Spineless Cactus."