Calistoga, CA

ZIP code 94515 encompasses Calistoga, at the northern end of Napa Valley. Notable landmarks include the Old Faithful Geyser of California, the Petrified Forest, and Castello di Amorosa, a winery built in the style of a medieval castle. In town, the Sharpsteen Museum documents local history, while Calistoga’s hot springs and historic downtown reflect its long-standing role as a destination for visitors.