Dún Aonghasa – Ancient Stone Fort and Visitor Centre

€1.6 million has been invested at Dún Aonghasa by the Office of Public Works, Fáilte Ireland and the Department of Housing, Local Government and Heritage.The major refurbishment transformed this significant prehistoric site, introducing a new immerive visitor experience ahead of its reopening in 2026. The project enhances year-round visitor offering and supports sustainable tourism on the Aran Islands

The upgraded visitor centre serves as the gateway to the monument, located at the start of a 1km pedestrian route to the cliff-top fort.

Dún Aonghasa Visitor Centre operates year-round, with guided tours.

Perilously perched on a sheer sea-cliff, Dún Aonghasa defiantly faces the Atlantic Ocean. It is the largest of the prehistoric stone forts of the Aran Islands.

The fort consists of three massive drystone defence walls. Outside them is a chevaux-de-frise – that is, a dense band of jagged, upright stones, thousands in number. A devastatingly effective way to impede intruders, the chevaux-de-frise surrounds the entire fort from cliff to cliff.

Dún Aonghasa is over 3,000 years old. Excavations have revealed significant evidence of prehistoric metalworking, as well as several houses and burials. The whole complex was refortified in AD 700–800.

The visit involves a short hike over rising ground and rough, natural rock, so come prepared with boots or strong walking shoes. Be careful, too, when walking near the cliff – there is no fence or barrier at the edge of the 87-metre drop.