Natural hexagonal volcanic columns in Ireland. They look similar to the dinosaur scales.
Photo: http://images.google.com/imgres?imgurl=http://www.bjandtony.com/images/070410_35_DUB_Giants_Causeway.JPG&imgrefurl=http://www.bjandtony.com/200704NorthernIreland.html&h=480&w=640&sz=38&hl=en&start=82&sig2=BMtLaPrsEM5WkNgCpamQDA&um=1&tbnid=7n2gd59kFgPGbM:&tbnh=103&tbnw=137&ei=xZJWSP-BDJfiigG_uq2QAw&prev=/images%3Fq%3Dgiants%2Bcauseway%26start%3D80%26ndsp%3D20%26um%3D1%26hl%3Den%26client%3Dfirefox-a%26rls%3Dorg.mozilla:en-US:official%26sa%3DN
