That's how I saw it as well. When you rotate to the "side" (pivot) in the 4th dimension, you see the wall and its change over time as one entity. So then you ca

That's how I saw it as well. When you rotate to the "side" (pivot) in the 4th dimension, you see the wall and its change over time as one entity. So then you can either pick going around the start (when construction of the wall began) or at the end (when the wall falls). Naturally the landscape would also experience change, hence the desert. When you pivot back, you are at the same location in time and space of the 3rd dimension, just in front of the wall now.