This 6×12 panorama was an accidental double-exposure. At first glance it looks like an image of trees are layered over the sky, but it’s not as simple as that. Those trees belong to the scene on the left of a group of rock climbers, while the mountains and the lake in the center and to the right are from a second scene. If my memory is correct, I remember a lot of shade to the right of the rock climbers and so that part of the frame would not have been as exposed, allowing the second image to come through. This photo was taken at Grassi Lakes in Canmore, Alberta.