The joy of a trip to Cannes (which is a town, not a city, but let's not get technical) is that, thanks to great transport options along the coast, it opens up the entire French Rivera to you and your friends. Though Cannes itself boasts plenty to keep you occupied (including beaches, a marina, and half a dozen museums including one dedicated to perfume), it's also a great starting point for visiting other places along the coast like Monte Carlo, Villefranche, Eze, Nice, and even the island of Corsica. Pack plenty of bikinis! Don't forget to travel inland too; the villages on the hillsides around Cannes and Nice are stunning, and many boast their own artistic communities.