When Henry David Thoreau took to the woods in 1845 to begin his Walden experiment, it was more of an exercise in social deprivation than an outright attempt to recharge his creative batteries. But his flight from civilization does prove that he — and all the generations of writers and makers who have flocked to sylvan retreats for productivity’s sake — felt every bit as besieged by the distractions of modern life as we do nearly two centuries later. Paging through Arcadia (Gestalten, 2009), a catalog of contemporary architectural hideaways built among trees and mountains, all I could think about was how powerful a tool nature has always been in creative life: We need to be immersed in culture to inform the things we create, but we also desperately need escape to give our minds the space to process it.