The new book “Exploring the Berryessa Region / A Geology, Nature, and History Tour” makes clear that there’s much more to see and explore in the area west/northwest of Davis than the Lake Berryessa reservoir--from stunning views and the Hubcap Ranch, to the region’s cultural heritage and the features that make it a hot spot of biological diversity. On today’s Davisville we talk with co-author Marc Hoshovsky, a retired naturalist in Davis, about what’s up there, plus how and when to see it.