Caesarea Aqueduct and Aqueduct Beach

The line of arches reads as one structure only from a distance. Close up it is two channels of different dates set side by side on a shared line of piers, with the remains of later alterations on top of them. The sequence was established by five salvage excavations along the central sector of the aqueduct, published by Yosef Porath and Uzi 'Ad in 'Atiqot, the journal of the Israel Antiquities Authority, in 2015.

Their order is Channel A first, built at some point between Herod's inauguration of the city in 10/9 BCE and the reign of Hadrian, and on the architecture and the plaster more probably Flavian than Herodian. Channel B second, dated by an inscription to Hadrian. Channel C replaced B, and a gravity channel, C2, replaced the Channel C pipeline in the sixth century as the last stage of the system. The whole aqueduct ran for roughly six centuries, until the city fell to the Muslim armies in 640/1.

The two channels were not built to the same size, and the published dimensions make the reason for the second one obvious: it was not a spare, it was extra capacity. The figures below follow the summary of the excavation reports in the Hebrew Wikipedia article on the Caesarea aqueducts.

The join is the detail worth finding on the ground. Channel A was finished with a moulded cornice down both faces. When Channel B was set against its right side, that cornice was swallowed by the join and became invisible, so the builders of B cut a matching cornice along the outer face of the new channel, where the sea wind now hits it. What looks like decoration is in fact a record of a decision to preserve the look of the older work after doubling it.

• Channel A: about 115 cm high, 70 cm wide, a fall of roughly 16 cm per kilometre, up to about 930 m³ of water an hour
• Channel B: about 140 cm high, 90 cm wide, up to about 1,600 m³ an hour
• Channel B drew additional water through a tunnel some 6 km long, cut with vertical shafts about every 40 metres
• Channel C: a later, smaller channel raised on top of the blocked Channel B
• The system in total: about six centuries of continuous use, ending in 640/1

The outer face of Channel B carries dedicatory inscriptions cut by the units that built or repaired it, and they are the reason the second channel can be dated at all. Four legions are named across them: Legio X Fretensis, Legio VI Ferrata, Legio XXII Deiotariana and Legio II Traiana Fortis. Most of the texts name Hadrian, whose eastern tour brought him to Caesarea in 130 CE, and the growth of the city is the usual explanation for why a second channel was wanted at that moment.

Published counts of the inscriptions do not agree, and it is worth saying so rather than picking one. The World History Encyclopedia's account of the Hadrianic aqueduct itemises five texts naming the Tenth, two naming the Sixth, one the Twenty-Second and one the Second. The Hebrew Wikipedia account puts eleven inscriptions on Channel B, of which ten are Latin legionary texts and one is a Greek inscription of 385 recording repair work in the Byzantine period. Several of the Latin texts record repairs rather than first construction, and one erased text is generally presumed to have belonged to the Twenty-Second, a legion that disappears from the record around the Bar Kokhba revolt.

Two of them are on the beach itself. Set into the western face of the aqueduct are a pair of marble plaques, the southern one carrying a legible Latin text and the northern one rubbed out. Others are elsewhere on the line or have been lifted into museums: one of the best known is built into the aqueduct near Beit Hanania, a few kilometres north, and pairs the legionary emblem with a tabula ansata reading IMP CAES TRIAN HADR. Specimens are held by the Ralli Museum in Caesarea, the Israel Museum and the Rockefeller Museum in Jerusalem.

The plaques are easy to walk past. Most visitors approach from the car park and photograph the arcade from the landward side, and the inscribed face is the seaward one.

On the night of 17 August 2023 the western face of one arch collapsed onto the sand. The section that failed belonged to the Hadrianic work, and the beach beneath it was in use. Eli Eskosido, director-general of the Israel Antiquities Authority, told reporters: "It's pure luck that bathers weren't killed. We have been sounding the alarm, we presented documents and plans, we said the situation was catastrophic and there was a real danger of collapse, we met again and again with the owners of the land, we even offered to cover some of the cost of the works."

The authority's conservation department used the moment to widen the warning. Its head, Ami Shahar, said the aqueduct at Acre, some 15 kilometres of it, was in a worse engineering state again and needed immediate attention. Nothing about the Caesarea arcade is unusual in that respect: it is masonry standing in salt spray and shifting dune.

The response took two and a half years. In February 2026 the Israel Antiquities Authority, the Carmel Beach Regional Council and the Caesarea Development Corporation signed a joint agreement worth ₪39 million. Of that, ₪15 million from the antiquities authority, the regional council and the Edmond de Rothschild Foundation pays for planning, conservation, the structural stabilisation of each of the 85 arches, engineering treatment of the water channel on top and a safe crossing for pedestrians. The remaining ₪24 million from the Caesarea Development Corporation pays for infrastructure, landscape maintenance around the aqueduct, walking trails, parking arrangements and visitor toilets. The work is expected to take about 40 months.

The practical effect for a visitor now is that parts of the arcade are fenced, and that the structure is not one to lean on, climb or shelter under. The sand runs right up to the piers, which makes it easy to forget that this is a building that has already dropped a face onto a public beach once.

The single most useful fact about this beach is that the arches and the lifeguard are not in the same place. There are two car parks. The small free one sits at the southern end, directly beside the aqueduct, and has no lifeguard station. The larger paid one is about 300 metres north, and the lifeguard station stands opposite it. People park at the free southern lot because it is under the arches, swim where they parked, and are then swimming on an unsupervised stretch of an otherwise supervised beach.

What the operator publishes is straightforward. Entry to the beach is free. The beach is open April to October, from 08:00 to 17:00. Lifeguard cover, the kiosk, the showers and the toilets all run through the bathing season, April to October, and not outside it. There are shaded areas and drinking-water points along the beach, no benches and no tables, and no overnight parking or sleeping. The Caesarea Development Corporation says the beach is accessible to wheelchairs and pushchairs during the bathing season.

Those published hours and the council's own do not quite line up, which matters if the plan is a late swim. When the Carmel Beach Regional Council reopened its beaches on 30 April 2026 it stated lifeguard hours of 09:00 to 17:00, extended to 08:00 to 18:00 in July and August. The operator's page says the beach is open 08:00 to 17:00. Either way the sand is physically open outside those hours and nobody is watching the water then.

Two other things are worth knowing about the strip. The Israel National Trail, the footpath that runs from Dan to Eilat, passes along this beach, so the walkers coming through in spring are not lost. And on the eastern side of the car park is a second, quite different aqueduct: the low-level channel, which is not carried on arches at all and brought water from the dam in what is now the Taninim Stream reserve.

Aqueduct Beach is one of five declared bathing beaches run by the Carmel Beach Regional Council, and in the spring of 2026 none of them opened on time. Nearly three weeks after the national bathing season began, the council was still providing no lifeguards, no cleaning and no beach facilities, on the grounds that the Interior Ministry had not transferred the money to run them.

The council's case, set out in a letter from its head, Asif Isaac, was that the budgets for 2025 and 2026 had not arrived despite repeated requests, and that the interior minister had not signed the amended by-laws the council needs in order to enforce, charge and operate the beaches properly. Its coastline is the longest of any authority in Israel, about 42 kilometres, of which some 26 kilometres are open undeclared shore; its five declared beaches, Neve Yam, Nahsholim, Dor Merkaz, Dor Darom and Aqueduct, take more than three million bathers a year. "The Carmel coast beaches are an asset of every citizen of Israel, not only of the council's residents," Isaac said. "It cannot be that one council carries the burden of a national service on this scale alone." The council announced it was preparing a petition to the High Court of Justice.

On 30 April 2026 it reversed itself and opened the beaches anyway, saying it did so out of responsibility to a public for whom the sea is a refuge in a difficult period. Six beaches opened, the five above plus a new one at Neve Yam South, with lifeguard cover from 09:00 to 17:00 and from 08:00 to 18:00 in July and August.

The underlying argument was not settled by that decision, which is the reason to check before travelling in spring. A beach that depends on an annual transfer from a ministry can be declared on paper and unsupervised in practice, and this one has been both inside a single season.