The fine dining room at the Omni La Mansión del Río has a couple of things going for it: the setting and the food. You have a choice of dining on well-prepared, beautifully presented cuisine on a lovely riverside veranda; a palm-decked, Mexican tiled patio; or inside in one of several antiques-filled interior rooms, The menu changes seasonally and tweaks traditional dishes—the chicken pot pie might include truffles, for example—but most of the fare is comfortingly familiar; go for the chef tasting menu ($65; $95 with wine) if you’re feeling adventurous. While this is a special-occasion and visitor-oriented restaurant at dinnertime, the copious Sunday champagne brunch buffet is a local favorite; be sure to reserve.