Dun Aonghasa, Inishmore

4.8
#1 of 12 in Things to do in Inishmore
Perched atop a cliff, Dun Aonghasa represents the most popular of the prehistoric forts on the Aran Islands. Walk from the nearby museum up to the fort and enjoy panoramic views from the 100 m (328 ft) cliff. Marvel at the three terraced walls and intricate defense system of stones called Chevaux de Frise. Archeological studies have revealed that the fort was built in the Iron Age, possibly as far back as 1100 BCE, though the triple-wall defenses were likely added around 500 BCE. The fort is named for a pre-Christian god or mythical king, Aonghus mac Umhor. Explore the history of this ancient monument, but take care when walking and climbing around the site, especially with children, as it can be slippery. See Dun Aonghasa and all Inishmore has to offer by arranging your trip with our Inishmore trip generator.
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Reviews
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1,070 reviews
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4.8
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  • August 17, 2017
    Went there on first day but so many people turned around and left. Went back second day later in evening and well worth the visit. Spectacular views and worth the climb  more »
  • August 16, 2017
    This is amazing old Celtic or older fort. Quite a climb up, but well worth it. The views are spectacular. One wonders who put these structures up. Take the hike. Very photogenic. Stay away from the cl...  more »
  • August 16, 2017
    Situated on the Aran Island Inishmore partly reconstructed Fort. The ship is a good 45 minutes and very recommendable in beautiful weather day trip. removed. Its location close to a 90 meter high cliff is also not without! Out there is either easily accessible by a shuttle bus, bike or a horse-drawn carriage.
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  • June 24, 2017
    I loved this place. The sheer cliffs right on the ocean are stunning. I would strongly recommend against small children but for adults and older kids it's a good place to explore the Norman fort and basalt formations.
  • June 7, 2017
    I love visiting the Aran Islands, and this is a great site. If it's nice out rent a bike and go, if it's not nice out, rent a bike if you can handle it, if you can't, take a tour with a local van and you'll have a blast either way. I've done both. My sister and I still laugh about ours and how hilarious he was.
  • July 6, 2017
    Jaw dropping beauty. It's absolutely stunning! Brace yourself for a big walk and no 3G.
  • May 4, 2017
    Incredible view! I was very surprised that there is absolutely NOTHING protecting visitors from just falling over. Ha! It was really neat to lay flat on your belly to peer over the ledge and straight down into the Atlantic!
  • April 18, 2017
    Fantastic landscape, and nice walk. Fort itself is a bit underwhelming, but the drop off the edge of it will make up for that. Be careful, because it's an unprotected cliff. If you're stuck for time give this a miss and see the wormhole instead.

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Where to stay in Inishmore

Take your time soaking in the beauty of the largest of the Aran Islands, Inishmore, while staying at one of its beautiful bed and breakfasts or renting a guesthouse. Accommodations range from private homes overlooking their own beaches and stone mansions, to basic rentals and quaint bed and breakfast spots. Many options are located in the town of Kilronan, but you can choose the island spot that best fits your needs (either seaside to close to ruins).
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