The McGinn family started their 90 acre pistachio orchard in 1980. Today, the orchard contains over 12,500 trees. 14 acres of grapes are also grown at Pistachio Tree Ranch and 18 different varities of wine are made at McGinn's Arena Blanca Winery on site. In 2008, a memorial to the founder, Thomas McGinn, was built. It is a 30 foot pistachio monument and is the World's Largest Pistachio. The McGinn's operate two country stores with pistachios, pistachio candies and wines all grown and made on site. They also offer gourmet foods, souvenirs, t-shirts and ice cream. Guests are able to shop, tour the orchard, enjoy free samples of wine and pistachios, and of course, get their picture taken with the World's Largest Pistachio. Open daily 9-6. Winetasting and sales begin at 12 noon on Sundays.