Designed in the 18C by military engineer JP Mareschal, this garden is at the foot and on the slopes of Mont Cavalier, atop which stands the Magne Tower. It was laid out in accordance with the classical layout around the Nemausus spring, spreading forth a supply of water that feeds pools and the canal. In the Gallo-Roman period, this area was the site of the baths, theatre and the temple of Diana which with its surrounding greenery makes for a romantic backdrop.