Would you know what to do if you were stranded in some of the world's harshest environments? Les "Survivorman" Stroud is determined to find out. Sierra Nevada: It's easy to get lost and succumb to the perils of this environment. Colorado Rockies: Les must learn how to gather food and water while navigating the precarious precipice. Arctic Tundra: Les learns some particularly harsh lessons in solo arctic survival. Deep Woods: Les discovers just how wrong a hunting trip can go. Australian Outback: Les gets stranded in the remote Australian Outback when his ultralight airplane runs out of fuel. Papua New Guinea: Though food appears to be plentiful, surviving for a week is going to be an exhausting adventure.