Drumanagh

In early 2018 they announced a Draft Conservation and Management Plan for consultation, including protection from further damage by motorbike scrambling, and integration into coastal walking paths.

[5] The area consists of a small peninsula of about 40 acres, defended across the neck of the headland by three parallel earth banks running some 350 metres, north-south and fairly straight, with ditches in front of them.

[7] The headland is surrounded on three sides by the Irish Sea, showing huge erosion that could have reduced its size to the present 44 acres (180,000 m2) and may have destroyed evidences of old Roman structures.[speculation?]

[10] Barry Raftery[11] and Gabriel Cooney[12] have suggested that the fort may have been used by Gnaeus Julius Agricola, then Roman governor of Britain, for an invasion of Ireland in AD 82.

Professor Michael Herity of UCD stated that the quantity and nature of the material from the site, taken together with the structural evidence, suggest a rich Irish emporium, which traded extensively with the Roman world.

View from Loughshinny of Drumanagh with its Martello Tower
Lambay Island , just off the coast very close to Drumanagh. Some remains (Roman brooches and decorative metalware) were discovered on the island, which are thought to date to the 1st century AD. The nature of artefacts found there also demonstrated Romano-British trading.
Tacitus wrote that the Roman general Agricola in 82 crossed the sea (of Ireland?) from western Britain and conquered "tribes unknown" to Romans.