The famous Grand Casino is only one of several but, if you are feeling lucky, note that it operates a strict dress code and requires all players to show passports. The first thing you notice when you arrive is how pristine the mega-yachts look in the harbour. This only fuels the suspicion that their owners - rather than risk going to sea - actually prefer to tie-up permanently at one of the worlds most fashionable addresses. Monacos three main districts are all walkable from the harbour: Monaco Ville (the intriguing old town), La Condamine (business centre), and Monte Carlo (the glitzy new town). Grimaldi Prince Rainier III put Monaco on the map by marrying film star Grace Kelly in 1955 and he is now buried alongside Princess Grace in St Nicholas Cathedral in Monaco Ville.