Hungary's capital city, Budapest is one of the largest in the European Union, radiating 19th-century charm. Flanking two sides of the Danube, Budapest as we know it was created by the merging of Buda and Pest, two historic cities. From the spectacular Buda Castle with its imposing Baroque architecture to the fairy-tale towers of Vajdahunyad Castle and the neoclassical dome of St. Stephen's Basilica, the city is alive with the legacy of the past. Renowned for its natural hot springs, the city is one of the best-known spa towns in Europe and draws visitors who luxuriate in its therapeutic waters. From stately orchestras and operas to a dynamic nightlife scene, panoramic cruises and world-class dining, visitors have plenty to do once the sun sets on this historic city.