However, the most striking effect is produced by the big cascade flowing out of a krater perched in the middle of the exedra. Jets of water were activated whenever unsuspecting people walked under the arcades. Behind the exedra rises an artificial mountain, with three alcoves holding statues of the Sibylla of Tibur with her son Melicerte (1568) and the river divinities Erculaneo and Anio. To the west is its counterpart, the Fountain of Rome (Rometta) built in 1567-70.
The Fontana del Bicchierone (Fountain of the Great Glass), built according to a design by Bernini (1660-61) was added to the decoration of the central longitudinal axis in the 17th century. This fountain is in the shape of a serrated chalice, from which a high jet of water falls into a conch shell. During this period the large pergola at the original entrance to the villa was also replaced by the Rotunda of the Cypresses (c . 1640), a circular area adorned with four small fountains and surrounded by ancient cypress trees