This is truly a hidden gem and in fact quite difficult to reach. The precise location of the arch evaded me – it was somewhere on Templebreaga Head. There is no path there and the way either involves a long coastal walk or a shorter walk through farmland. In the end, we drove to the nearest house, asked for directions, and was kindly greeted by the owner who directed me across his fields. Here is the geolocation of the house 55°12'34.0"N 8°00'21.6"W as this might involve crossing farmland I would recommend you to check with the farmer if they can kindly let you cross their land. If you have issues going this way you can also simply Lookout Point Horn Head, however, this may involve a long hike on the coast which might be muddy at times, bring appropriate footwear. 