Gandia is city on the east coast of Spain. Its old town is home to the 15th-century Los Borja Ducal Palace. The Archaeological Museum of Gandia has prehistoric artifacts. To the west, the Monastery of Sant Jeroni de Cotalba has Moorish cloisters. Parpalló-Borrell Natural Park encompasses the Cueva del Parpalló, an Upper Paleolithic–era cave.…