Stylish San Sebastian (Donostia in Basque) has the air of an upscale resort, complete with an idyllic location on the shell-shaped Bahia de la Concha.  The natural setting - crystalline waters, a flawless beach, green hills on all sides - is captivating, but the city itself has plenty to offer.  Head to the buzzing Parte Vieja for tempting tapas bars and restaurants showing off the best of Basque cuisine.