Compléter The City That Never SleepsVersion en ligne LL Comp Build Know, Ships & Rafts, The City That Never Sleeps par Stephanie Turner 1 towed thick building down In the cold north near the Arctic , there is the tundra . The tundra is little more than frozen dirt . There is very little plant life . But below the tundra , there are forests . People cut the trees in the forest for in the South . The challenge is getting the trees to the South where they are needed . There are many stream in the forest that flow to hundreds of lakes . The loggers use mules to drag the tree trunks to the streams . The trees are then floated down to the lakes . There , they are bound togethers to make huge rafts . These rafts are downstream to the sawmills .