The village of Ventabren boasts the largest stone aqueduct in the world. Known as the Roquefavour Viaduct, this architectural treasure was built between 1841 and 1847 by Franz Mayor de Montricher. It straddles the valley of the Arc and takes drinking water to Marseille from the Durance. Its clean water supply brought to an end centuries of shortage, deprivation and epidemics, and saved Marseille from cholera in the 19th century.
There are two routes to choose from, one of 45 minutes and one of 1½ hours. During your walk you will see a typical Provençal panorama: the Luberon and Ventoux to the north, Berre Lake to the south, the Alpilles to the west and Sainte-Victoire to the east. After you have seen the aqueduct, a listed historical monument, the last part of your walk follows the ramparts of the "Camp of Marius", a vast Celto-Ligurian oppidum built in the 5th century BC.