Pont d'Aël

Is it worth the trip?

Yes, if you are in the Aosta Valley between April and early November. This is a Roman aqueduct bridge you can walk both over and through, it stands above a 66 m drop, and its inscription states plainly who built it, when, and with whose money. It also pairs naturally with Augusta Praetoria – Aosta, the Roman colony a short drive away.

Keep expectations to scale: this is one bridge and its setting, not a ruin field, and the site is closed from 3 November to the end of March.

Getting there

The bridge is at the hamlet of Pont d’Aël in the comune of Aymavilles, on the right of the road from Aymavilles to Cogne, about 8 km south-west of Aosta (the operator; it.wikipedia for the distance). A free car park lies about 180 m from the bridge, and free public toilets are mapped nearby (OpenStreetMap). Without a car, take the Aosta–Cogne bus, which runs daily, to the stop “Aymavilles – Pont d’Aël” and walk about 1 km to the bridge (the operator).

From April to September it is open every day from 09.00 to 19.00; from 1 October to 2 November, every day from 10.00 to 13.00 and 14.00 to 17.00; it is closed from 3 November to 31 March. A ticket for the covered passage costs €5, or €3 for ages 19 to 25 and groups of at least 25 paying visitors; it is free up to 18, for disabled visitors and their companions, and for teachers with school groups, and for holders of the Abbonamento Musei Piemonte e Lombardia museum pass. The operator recommends buying online through MiDA ticket, warns that hours can change, and bars bulky backpacks and bags. The site is only partly accessible by wheelchair, though visitors with reduced mobility can look out from the bridge at its structure (lovevda.it, the Valle d’Aosta Region’s tourism office, read 19 October 2026 — check before travelling).

History

The inscription on the north face reads IMP CAESARE AVGVSTO XIII COS DESIG / C AVILLIVS C F CAIMVS PATAVINVS / PRIVATVM: under the emperor Augustus, consul designate for the thirteenth time, Gaius Avillius Caimus, son of Gaius, of Patavium (Padua), built it at his own expense. That dates the bridge to 3 BC, when Augusta Praetoria (Aosta) was a newly founded colony (de.wikipedia; the operator). Caimus, from Patavium – Padua, belonged to the Avillii, a wealthy family of entrepreneurs by then well established in north-western Cisalpine Gaul (the operator); de.wikipedia calls him one of the lessees of the nearby mines.

What the water was for is read two ways. Mathias Döring, who made the first complete survey of the bridge in 1996, concluded that the 6 km aqueduct took water from the Grand Eyvia 2.9 km above the bridge to irrigate some 200 hectares of farmland west of Aosta, and supplied a washery for metal ore mined at Cogne on the way (de.wikipedia). The Region’s tourism page instead connects it to the quarrying and working of bardiglio, a grey-blue marble whose quarries have been identified further down the valley at Pesse, in Aymavilles, and which is used in many of Roman Aosta’s monuments (the operator). Either way, the operator notes that private aqueducts not tied to a villa or an estate are very rare. A water supply for Aosta itself is ruled out: the town drew its water from the nearby Buthier (de.wikipedia).

The lower passage is also read two ways. de.wikipedia describes a control corridor, 50.35 m long and 3.88 m high, whose windows lit floor and ceiling so that the bridge keeper could spot leaking water before frost damaged the masonry (de.wikipedia); the operator describes it as a walkway about a metre wide, ventilated and lit, for people and animals. The bridge probably once had a third storey, perhaps an open walkway, which would have brought its height to 22.15 m (de.wikipedia).

The earliest surviving description, with a sketch, is Pingone’s of 1550; views by Baron de Malzen (1826) and Aubert (1860) already show the bridge as it is today (de.wikipedia).