Hāmākua Macadamia Nut Company

The visitor center, gift shop, and factory window-walk are publicly open during posted hours. The factory floor itself is closed to visitors — observe through the windows. Production typically runs until 3 PM; arriving after that gets you the showroom and the video, not the working line. Free tastings are part of the visit; take what's offered, don't help yourself to extras. The orchards visible nearby are private property.