Filoli is always nice to visit. It's got gorgeous gardens to wander, tadpoles in their water feature, and a mansion to tour. They also do special events like decorating for Christmas. Recently they put in a restaurant that I haven't visited yet. Their gift shop has some nice garden themed things that you can't find other places. They also have a garden center to get plants. A really nice place for the whole family. The only problem is that the whole gardens are not wheelchair/stroller friendly -- there are some steps that you have to navigate and the path can be narrow.