The Burren is a region of County Clare made up of a huge limestone sheet. The name "The Burren" is derived from an Irish term meaning "The Rocky Place."
During Cromwell's campaigns in Ireland one of his generals said of the Burren "There isn't tree to hang a man, water to drown a man nor soil to bury a man". And so the residents were spared the from Cromwell's protestant crusade. It's a very apt description. Nothing of any size can grow in the limestone sheet the forms the surface of this entire area, on short grasses and wildflowers. Even so, some of the oldest historical monuments in Ireland can be found in this area, dating back an incomprehensible 5 millenia, to when the Great Pyramids were still under constructions.
In modern times, few people live in the Burren. Those that do are mostly Irish speakers.