There were two large rock shelters.. I don't recall seeing the huge cairn in that photo you took. Perhaps it was made into one of these shelters..? Possible too that I missed it--don't pay much attention to cairns in this weather.
"So I was sitting in my cubicle today, and I realized, ever since I started working, every single day of my life has been worse than the day before it. So that means that every single day that you see me, that's on the worst day of my life."
--Peter Gibbons (Office Space)