Super-cell Lightning, Snyder, Nebraska Under a super-cell thunderstorm, a "wall cloud" or "pedestal cloud" may form. This is frequently associated with tornadoes and micro-bursts. Here, a "cloud-to-ground" lightning bolt strikes from a wall cloud.
The waterfall of Skógafoss (Iceland) topples over a rocky cliff at the western edge of Skógar in dramatic style. Climb the steep staircase alongside for giddying views downwards, or walk to the foot of the falls, shrouded in sheets of mist and rainbows.