I have come across many otter sprainting sites over the years but never one on the scale of this one on the north coast of Scotland. The vegetation peak was about a foot high and clearly visible from a hundred metres away, nourished no doubt by many years of rich dung. Never saw the depositor though unfortunately. Not too many years ago I had to leave my home patch in NE England and travel to the west coast of Scotland to have much chance of otter watching. Now I can go to a mining subsidence pond on the northern outskirts of Tyneside and have a better chance of seeing them. Quite a comeback.