Bring an air mattress.
This half-frozen waterfall just above tideline, with its troll and its troll sheep, is not on any tour route and, like most of the beautiful places in Iceland, is not on any map.
The really beautiful stuff you have to find on your own. When you do, after that effort, you’re not likely to tell anyone where it is, and it wouldn’t matter if you did, because the moment would be past. This is called respect.