If your trip to La Bastide-de-Serou is all sorted out but your travel itinerary is a bit on the empty side, let us give you a few hints and tips.Plan a stop at Lac de Mondely. It's one sight you'll usually find on most visitors' must-do lists. If you still have space on that travel itinerary, La Ferme des Reptiles and Ariege Golf will keep you busy as well.