The Carrowkeel Megalithic Site is a Tentative World Heritage site,  located  near the village of Castlebaldwin just off the N4. It is an ancient passage tomb cemetery, comprising 14 fascinating cairns built between 3200 and 2400 BC.  The hike to the top of the mountain is relatively easy – the kids will mange it – and the view from the top is stunning and well worth the effort. Just a 20 minute drive from Carrick on Shannon, Carrowkeel is must see when visiting the area.