France boasts 41 UNESCO sites, but many of them fly under the tourist radar. Here’s a peek at the country’s top World Heritage havens. A medieval fortress town bordered by an impressive canal, Carcassonne offers two UNESCO World Heritage sites in the space of a few square miles. Fans of the knights-in-shining-armor era will find their happy place in this bustling city in south-central France. In fact, Carcassone represents one of the biggest and best preserved fortified cities in Europe.