Napa is located north of San Francisco off Interstate 80. The Napa Valley is the heart of California wine country and produces some of the best wines in the world. Its rolling hillsides and cool ocean breezes make it ideal for viticulture and tourists alike. Dozens of wineries welcome visitors for wine tasting all along the St. Helena Highway. The Napa Valley includes the small towns of Yountville, Rutherford, St. Helena and Calistoga. Many of Napa's most impressive wineries are located between Yountville and Calistoga. The upscale community of Yountville is mecca for Michelin-rated restaurants and five-star resorts. Wind down and relax at local spa. Soar over corduroy vineyards in a hot air balloon. Safely hop from one winery to another on a wine tasting tour. Find hotels, restaurants, the Napa River Walk and the Napa Valley Opera House at the Napa Mill in Downtown Napa. Visit Old Faithful Geyser in Calistoga that erupts every 20-30 minutes. Also in Calistoga is the Petrified Forest of 3-million year old redwoods that are so old they've turned into rock. Take flight with Crazy Creek Air Adventures in a glider plane or classic bi-plane over wineries, mountains and lakes. The nearby Lake Hennessey and Lake Berryessa offer fishing, boating, houseboating, water sports, camping, picnicking and more. Practice your game at one of dozens of local golf courses. Several local State Parks offer camping, hiking, mountain biking, horseback riding and picnicking. Ride a bike past vineyards and wineries along the less traveled Silverado Trail that parallels Highway 29. Visit the Robert Louis Stevenson Silverado Museum in St. Helena to see artifacts related to the world-renowned author.