Ready to take an extended break? These multi-day hikes are ideal for serious alone time.Aerial view of the forest on Via Transilvanica in Romania.Credit: alexionutcoman/Getty ImagesThere’s never been a better time to go for a long walk. While some trails loom large in the popular imagination—the Pacific Crest Trail, for example, or the Camino de Santiago—the past several years has seen the development of new long-distance trails all over the wor…