The trio start by sailing down the Shannon in the best weather Ireland has had in years, stopping off along the way to visit a friend of Dara's who also lives in Ireland's most haunted castle. After that they must face sailing through the terrifying Ardnacrusha, Europe's largest lock. Arriving in Limerick, Dara and Griff try a spot of powerboat racing, while Rory decides to host his own poetry festival for limericks only - the inaugural Limerick Limerick Competition. The journey ends with a trip to the stunning Aran Islands, where the Men take a Galway hooker to visit the megalithic fort of Dun Aengus.