Bear Grylls faces the punishing heat of the Moab Desert in Utah, where he faces the elements armed with a knife, water bottle and a flint. Among the obstacles are narrow canyons, venomous rattlesnakes and dangerous quicksand.Bear Grylls faces the punishing heat of the Moab Desert in Utah, where he faces the elements armed with a knife, water bottle and a flint. Among the obstacles are narrow canyons, venomous rattlesnakes and dangerous quicksand.