Mentioned by The Crazy Tourist
15 Best Things to Do in Limerick (Ireland
"Irish prehistory is always gripping, so you should be sure not to miss this archaeological site 20 kilometres south of Limerick. In hilly countryside, Lough Gur is a horseshoe lake with all sorts of megalithic remains on its banks. This pocket of land has been occupied by humans for more than 5,000 years, and has ring forts on the higher ground, traces of Stone Age houses, the Grange stone circle and three crannogs (Neolithic artificial islands)."