After 12 hours on the road, we are home from our vacation in Maine. Something I love about hiking up there are the cairns that mark the trails on the granite ledges at the top of the mountains in Acadia National Park. I admire the elegant and functional transaction between humans and nature that these deliberately stacked sets of stones represent, and I'm glad for their guidance as well. Furthermore, unlike a modern GPS device, they offer their navigational advice in silence. Much appreciated, cairns.