This is a must when you come to Napa! It’s one of the furthest north in the region on the map, but it is so worth it. I didn’t make a reservation in advance. However, if you go early in the morning when they first open, you will probably get in. They also do military discounts which is amazing! Their wines in the wine tasting were really good, The building, and the grounds that you are in our picturesque! Definitely walk the grounds. They have a beautiful lake and bridges, and in the front the building looks sort of like a castle. So definitely get a picture there! The inside seems castle like and cavelike as well. Me and my friends and family had a really good experience and they were great at being informative and making it fun! I would definitely go again!