I did not create this video, but I have stood in the same place this guy did for this clip. It becomes clear how these canyons formed. And the dangers.
I do not know when this was made. Don't take it as recent events.
There is an issue with Uploading Photos (attachjments). I am not sure what the problem is, and I am looking into it. You can still try to Create your Threads and Upload your Photos, but it is hanging up during the Upload.