The stark landscape of The Burren in County Clare, Ireland, comprises fields of Carboniferous Limestone rock pavement with sparse and specialised vegetation divided by walls of precariously balanced rocks. Moss and lichens cling to the limestone boulders and bent thorn trees miraculously survive with their roots among the stones.
Jessica's Nature Blog 
What pleasing patterns they make! It makes me wonder how the walls were built, as so many of the stones are almost vertical – like stacking dominoes?! I love how these old walls become little rock gardens over the centuries.
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