I visited this WHS in May 2012. It is surely one of the top WHS France has to offer IMO. The Visitor Centre is not that informative and it felt as if it was simply built to rake in an entrance fee from so many people who visit this site. The light shows organised there are quite interesting but the nature surrounding this huge WHS (olive groves, garigue land, the sound of the stream of water, etc) make it one of my personal favourite WHS. Bdw ... it is the same aqueduct depicted on the 5 Euro note :)