A visit to Opus One is a serious and stately affair that includes a formal (read stiff) but educational winery tour and a steeply priced but satisfying swig of the famed (and pricey) red wine developed in a partnership between wine legends Robert Mondavi and Baron Philippe de Rothschild. Architecture buffs in particular will appreciate the tour, which takes in both the impressive Greco-Roman-meets-20th-century building and the no-holds-barred ultra-high-tech production and aging facilities. Wine lovers will appreciate the attention to detail: The entire facility caters to one ultrapremium wine, which is offered here for a whopping $30 per 4-ounce taste (and a painful $190 per bottle). Grab your glass and head to the redwood rooftop deck to enjoy the view.