Grapes grown in the region are essential to the wine industry. Wineries draw a large population of tourists. With 160 wineries in the Columbia Valley, this industry accounts for $1 billion annually in Benton County alone. Many wineries such as Goose Ridge Estate Winery, Preston Premium Wines, and Tagaris Winery are open for wine tasting and special events. Often referred to as The Heart of Washington Wine Country, local and Tri-City wineries provide tours and wine club memberships. The Tri-Cities’ climate allows the region to have a broad and sustainable agricultural economy. Local industries provide employment for thousands of people in the Tri-Cities area. Some of the top 20 employers in agriculture include ConAgra, Tyson Foods, and Broetje Orchards. Agriculture makes up 9.5% of employment in Tri-Cities and local businesses combined employ thousands of people. In 2012, the state of Washington was rated #1 in the nation when it comes to growing apples, hops, spearmint oil, sweet cherries, pears, concord grapes and processing carrots. The Mid-Columbia region including the Tri-Cities grows most of these crops. The region's climate and irrigation from nearby rivers, like the Columbia, Snake, and Yakima rivers, allow farmers to produce corn, hay, wheat and potatoes. In Washington there are 39,500 farms; 1,630 of these farms are located in Benton County and 891 are located in Franklin County. The Tri-Cities has a number of locally owned and operated restaurants. The Spudnut Shop, for example, located in northern Richland, was opened in 1948 and has been family-run ever since. The Travel Channel featured The Spudnut Shop and their donuts "made from potato flour and then deep-fried to perfection." Carmine's, also a family owned restaurant in the region, serves Italian food in a historic home that was constructed in downtown Kennewick in 1929. Another addition to these local restaurants is Monterosso's Italian Restaurant which serves lunch and dinner in an antique railroad dining car. Also notable is the BBQ restaurant Porter's which began as a food truck in Richland and has been featured on Diners, Drive-Ins and Dives hosted by Guy Fieri   In contrast to Seattle, the western slopes of the Cascade Mountains, and the rain forests of the Olympic Peninsula, the Columbia Valley enjoys long, warm, summer days, and crisp cool nights.