Adventurers Andrew Skurka (left) and Roman Dial hike over the Arrigetch Peaks in Alaska. Photograph by Michael Christopher Brown, National Geographic . Dream Trip: Traverse Arctic Alaska and Canada Andrew Skurka Long-Distance Hiker
Climber John "Razor Sharp" Benson weaves through skin-ripping pinnacles. In Malagasy, the formations are called tsingy, meaning "where one cannot walk barefoot." The terrain resists intrusions from hunters, hungry cattle, and wildfires.