Tips: Get the map from the visitor's center at Dun Aengus. Ask several people for directions, as each person seemed to offer some bit of advice that turned out to be helpful and, putting all the advice together, we made it this fantastic sight!
If you have a bike, follow the map to Gort Na gGopall (a small village). There's a sign on the main road to the east of the beach that points to Poll na bPeist and Gort No gGopall. Go through the village and turn right past the last house, follow the path until you get to the grey gate and park your bike there.
Some nice (if destructive) person has painted occasional red arrows on the rocks from this point on to direct you - follow these. They'll take you across a huge field of boulders (labelled Storm Beach on the map).
You'll find three levels of shoreline: The lowest level has small tidepools filled with green moss. You don't want this level as the tide may trap you around the bend when you get to the Worm Hole. If you look up above the bottom level toward your right when you're facing the sea, you'll see a red arrow up above on the middle level. This is where you want to be, above the tide. Follow the shoreline around to the right, around a few bends, as you watch the cliffs above you get higher.
You'll go around a few bends and find the Worm Hole below you and the cliffs above you. You can also view the hole from the cliffs. If you're not sure whether or not you've seen it, you haven't seen it. Keep going and make sure you're at the level above the tide.
We went at low tide and there wasn't much action in the hole, although the size and geometry of it were still impressive.
It was rocky and slippery climbing so be sure to wear sturdy shoes!
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