This 150-acre family farm, established in 1850, is run by fourth-generation Greenwells and is one of Kona’s oldest and best-known coffee plantations. It currently roasts coffee cherries from more than 200 local growers. Take a free tour and sample coffee and fruit at a shady picnic table. You can also purchase Kona Red (www.konared.com), a juice made from coffee cherry pulp. The farm is between mile markers 110 and 111.