Ponte degli Arci

Four km SE of Tivoli three aqueducts cross the Via Empolitana: from top to bottom the Aqua Marcia,
the Anio Vetus and the Anio Novus. Just after a sharp bend in the Anio Vetus a bridge for the
Aqua Marcia was built inwhich space was reserved for the Anio Vetus (see top left at level 236.41
- top right at the drawing of Ashby (1935) - and the photo's)