Drive Napa Valley yourself, with a GPS audio guide that plays automatically as you go. Your booking unlocks the whole region in the free Wine Trails app: pick your date and starting point — Downtown Napa near Oxbow Public Market, Yountville, St. Helena or Calistoga — choose the cellar doors you want from the 58 mapped across the valley, and the app builds your personal route with turn-by-turn narration. 82 narrated stories cover the valley's people and places: as you pass Oakville you'll hear how one afternoon in Paris on 24 May 1976, when a 1973 Stag's Leap Wine Cellars Cabernet Sauvignon beat the great chateaux of Bordeaux at Steven Spurrier's blind tasting, put this valley back on the world map. No group, no schedule, no guide — pause for a long lunch, replay anything, and the audio keeps working when the signal drops, because everything downloads offline. You'll need a car and a designated driver; tastings are booked and paid directly with the wineries.