Poulnabrone Dolmen, Clare

The Burren in Ireland is made of limestone, and this naturally fissures into thin slabs which are ideal dolmen material. The Burren itself rich in megalithic sites, including wedge-tombs (dolmens). Poulnabrone is probably the best-known, with a steady stream of tour buses bringing sightseers in droves. It is testimony to the limestones that visitors, inspired by the megalithic form, have constructed mini-dolmens a few inches high all around the site from loose rock!