from the web: "The Selciatella Bridge, located near the Fosso dell'Acqua Rossa, is an ancient Roman structure that allowed the crossing of the moat. This bridge, of republican construction, was part of the Anius Vetus Aqueduct, built in 272 BC and subsequently reinforced during the Augustan era. Its length is approximately 13 meters and its width is 6 meters. During the Flavian dynasty (69-96 AD), it was partially rebuilt in brick, reaching a height of approximately 9 metres. meters The name “Selciatella” derives from the unit of measurement of the surface in the pontifical era, where 1 Taulella corresponded to 72 square rods.
To reach this fascinating bridge, you can follow a route that starts from the car parks of the Gallicano nel Lazio cemeteries. Taking via del Collacchio, you will embark on a small path that runs along the Fosso Caipoli, dug by the Rio Secco. After a few minutes, you will reach the Ponte Taulella, which is part of the same aqueduct system. You can cross it to admire the perspective of the Fosso or explore the technical details with which it was built. Continuing the path, you will arrive at a riding school and, from there, you will continue towards the source of the Fosso dell'Acqua Rossa. Along the way, you will be able to admire cultivated fields and two enormous cisterns dating back to Roman times. Finally, immersing yourself in the dense vegetation, you will reach the enchanting Ponte della Selciatella".