Roman Aqueduct of Altea

The Roman Aqueduct of Altea (known locally as the Acueducto de Els Arcs) is a set of Roman-era ruins hidden among citrus orchards on the outskirts of Altea, a coastal town on Spain's Costa Blanca in Alicante province.

What exactly are you looking at?

The remains belong to a Roman aqueduct built somewhere between the 2nd and 3rd centuries AD, during the height of Roman rule on the Iberian Peninsula. Its job was to carry water from the Algar River to two Roman-era settlements: a hilltop site known as Tossal de la Pila, northwest of the aqueduct, and another settlement near what is now Albir, to the south. To cross a deep ravine on its route - the Barranco d'Els Arcs, which gave the structure its popular name - the aqueduct's builders raised pillars reaching an estimated 10 to 15 metres in height.

How much of it survives?

Roughly 520 metres of the original route can still be traced today, though nothing like a continuous, intact structure remains. Four pillars still stand close to their original position, six others have collapsed or shifted out of place, and eighteen further points show nothing but the stone foundations. The best-preserved pillars measure 1.55 to 1.65 metres wide and were built using opus vittatum, a Roman technique that stacked small, irregular rectangular stone blocks - about 10 cm tall and 25 cm wide - held together with lime and sand mortar. That construction method is one of the main clues archaeologists use to date the site.

How do you get there?

The ruins sit on the edge of Altea's urban area, threaded through farm tracks and orchards rather than fenced off in a visitor centre. They form part of a local walking route called Ruta Magenta, and walking it is by far the easiest way to see the aqueduct - the path cuts through the kind of working agricultural land that still surrounds much of this stretch of Costa Blanca, well away from the beach crowds. Don't expect ticket booths, multilingual signage, or a dedicated car park; this is a low-key archaeological walk, best combined with a longer stroll through the area.

What happened to it after the Romans left?

The aqueduct's story didn't end with the fall of Rome. Part of its route stayed in use through the Middle Ages under the name Séquia Blanca, and between the 17th and 18th centuries the people of Altea rebuilt sections of it into a new irrigation channel, the Rec Nou, reusing whatever Roman stonework had survived. The ruins as we know them today were rediscovered and documented in the 1940s by Father Belda, a former director of the Archaeological Museum of Alicante. Recognition came much later: on 15 April 2011, the site was declared a Bien de Interés Cultural (Spain's top heritage protection category) under the monument classification.

Is it worth the detour?

This isn't a dramatic, postcard-ready Roman monument like the aqueducts of Segovia or Tarragona - it's a scattered, weathered set of ruins standing in open farmland, with no entrance fee and no crowds. That's exactly the appeal for history and archaeology fans: a chance to see genuine Roman water engineering that hasn't been reconstructed or dressed up for tourists. One caveat worth keeping in mind: urban development in the area is a genuine threat to what remains, with modern buildings now standing right beside - and in places directly over - the archaeological remains.

Frequently Asked Questions

How old is the Roman aqueduct in Altea? It dates to the 2nd or 3rd century AD, making it one of the oldest surviving engineering structures in the Marina Baixa region.

What was the aqueduct used for? It carried water from the Algar River to nearby Roman settlements and farmland, including the Tossal de la Pila site and the area now known as Albir.

Is it free to visit the ruins? Yes. The site is open and unfenced, reached via the Ruta Magenta walking trail through fields and orchards on the edge of Altea.

Is the aqueduct a protected heritage site? Yes, it was listed as a Bien de Interés Cultural (monument category) on 15 April 2011.