The terrain about the three heroes is a wide and shallow rise, the lowest slopes of a white mountain, covered in the snow that eternally cloaks the northern range. There is little in the way of vegetation here, lost beneath the chilling snow and whipping winds, a landscape of greys and whites and blacks, with all other colour drained away. It is a barren land, with so little growing that even the floating cities no longer pass overhead, preferring instead the southern reaches of the wall. All that lives here is creatures adapted to the cold, a long forgotten spread that fears the warmth of the summer.
The rumbling and roaring comes from a distant point, far up the mountain, but grows closer with each passing moment. Hints of a cloud can be seen in the glinting light.
[spoiler]If it's a controlled fall and you land on your feet at the end, that would be fine.[/spoiler]