World Heritage Sites Photo Gallery 1/7. Entrance to Carcassonne's walled "cité". 2/7. The town of Arles on the Rhone river 3/7. Avignon with its Pont d'Avignon and the Popes Palace 4/7. The Canal du Midi 5/7. The walled Medieval city of Carcassonne 6/7. Roman theatre in the town of Orange 7/7. Pont du Gard is a Roman aqueduct carrying water to Nimes