Quiet, tree-lined streets, lovely gardens and palatial homes characterize this affluent residential neighborhood, which lies just beyond the Presidio (the former army base that is now a national park). When the well-heeled denizens of Presidio Heights step out, it's often to investigate the antiques shops and small boutiques along Sacramento Street between Baker and Spruce streets. These carriage-trade establishments offer all the accouterments of gracious living, from English and continental antiques and designer clothing, to one-of-a-kind decorative objects and home furnishings. And make sure to save time for a visit to one of Sacramento Street 's fine restaurants like Garibalidis on Presidio or La Table, and stop in for a drink at G Spot. Map 1, G3