French Open

Going to miss Wimbledon? Never fear: if you're in Paris in late May / early June, head to the French Open instead. Also known as the Roland Garros, this is one of the big four Grand Slam tennis tournaments (along with Wimbledon, and the US and Australian Opens), and the only one played on clay courts. This makes the game slower and more strategic than on grass, and gives the whole event a wonderfully relaxed vibe.