The tiny Principality of Monaco on the Mediterranean Sea is one of the world's smallest countries, measuring less than one square mile, and Monte Carlo is its only city. Famous for its gambling casino, Monte Carlo is one of Europe's leading tourist resorts. See the magnificent Palais du Prince and, within the casino complex, the Grand Théâtre de Monte Carlo, an opera and ballet house, and the headquarters of the Ballets de Monte Carlo. Americans became particularly enchanted with the country after Grace Kelly married Prince Ranier III and today it is a popular destination due to its striking natural beauty. From here you can also visit Eze, Antibes, St. Paul de Vence, the villas of Cap Ferrat and Beaulieu.