Trip Advisor has ranked the top 10 American wine tours. The list includes tours through California's Napa and Sonoma Valleys, which are known for their Cabernet Sauvignon and Chardonnay wines. Other top tours visit Oregon's Willamette Valley and Washington's Yakima Valley, both renowned for Pinot Noir production. The tours offer visitors the chance to visit multiple wineries, learn about winemaking, and sample wines straight from the source in beautiful vineyard settings.