Those stacks of stones on the beach, perfectly balanced: they are called cairns. The word comes from Scottish Gaelic. Andy Goldsworthy has lived and worked in Scotland most of his life touching, not just stones, but also leaves and fallen trees, moss and ice and wind. In the process, he has developed an art form that seems more Buddhist than anything partly because it is constructed from detritus and is so ephemeral. His work will stay with you a long time.