There is nowhere quite like the city-state of Monaco, the playground of the rich and famous nestled at the end of the French Riviera. Walk along the harbour and marvel at the yachts (some with their own helicopters) or drop a month's salary in the famous casino. One of the best ways to visit is to fly into Nice and take the scenic train ride along the coast. It takes under an hour and stops at beautiful resorts like Èze and Villefranche-sur-Mer along the way.