The Pont du Gard is the largest Roman aqueduct still standing (I think). We picked up a family pass at the Tango bus store in the plaza behind the train station for about 15 Euro which included bus fare. While there I asked him which platform the bus came in on and he told me #7. Had I not asked him we would have missed our bus as there's to many platforms to keep an eye on.
The bus trip normally cost 1.50 Euro each and takes about 45 minutes. We brought swimwear so we could get wet while there as it was nearly 39 degrees and felt like a lot more.