A prehistoric hill fort, perched precariously on a 100m cliff over the harsh Atlantic Ocean... one of Ireland’s most ancient features, estimated to be more than 3,000 years old... Standing in Dún Aonghasa (the fort of Aonghas, in Irish), is a little like teetering on the edge of the world. And as the strong sea winds blow around you and the waves crash below, you’ll feel at one with the heartbeat of Celtic Ireland.
Like any good fortress, Dún Aonghasa keeps its secrets. No one knows who Aonghas was – maybe a displaced noble from east of the River Shannon, or a 5th century king of Cashel in County Tipperary. And the purpose of the rock platform that sits dramatically at the cliff edge remains a mystery. But that just adds to the appeal of this magical place. As you wander the ruins, it's best to let your imagination soar...
Dún Aonghasa is located on Inis Mór (Inishmore), the largest of the three Aran Islands – the name actually means ‘big island’ in the Irish language. The island's main hub is the village of Kilronan, where ferries from Clare and Galway arrive several times a day.
While Dún Aonghasa is its best-known attraction, Inis Mór has more than 50 different monuments from Christian, pre-Christian and Celtic eras. Stretching out terrifyingly over the sea is Dún Dúchatair, also known as the Black Fort. Erosion from the wild ocean has left the fort on a thin platform over the water so peek over the edge at your own risk!
And don’t miss Teaghlach Einne, the house of St Enda, a little church half-buried in sand at Killeany graveyard. The graveyard is at least 1500 years old, and still serves as the main burial ground for the island. St Enda himself, the patron saint of Inis Mór, is believed to be buried there.


Dun Aoghnasa, Inis Mór, County Galway
...the most magnificent barbaric monument extant in Europe
George Petrie, 19th century Irish archaeologist
Inis Mór is full of spectacular beaches. Kilmurvey beach lies in a sheltered cove, and has the calmest waters in the island. Stroll along the soft white sand or take a dip in the sea. If you’re feeling adventurous, visit Poll na bPeist, also called the Wormhole – a spectacular naturally formed rectangular pool in the cliffs into which the sea flows in and out. Scary as it looks, it’s a popular cliff diving spot for thrill-seeking visitors.
Scenes from Inis Mór, County Galway
Getting around on Inis Mór; friendly locals; the fort of Dun Eoghanachta; Teach nan Phaidi