Whether it's the freeze/thaw cycles, the prolific mosses, or the "tuftiness" of local grasses, uncultivated fields in Iceland are lumpy affairs, bedecked with organic bumps and pocked with micro craters. Such are the fairways of Selfoss's 18 hole campground course.
I should stipulate that "fairway" refers to the terrain between the tee and the green, not necessarily to a prescribed and/or maintained pathway. So far, it has been my experience that Icelandic course designers like to leave the land alone as much as possible, leaving you to contend with whatever grows—mostly various conifers and low brush. When there is a fairway, you can generally expect it to be a low, narrow tunnel
Despite the abundance of land, the holes don't tend to be long. Short and technical is the local flavor. There is only one par 4 on this course (#5), and it would completely be a tweener 3/4 without the mando which makes circle 2 tougher to find. #1 starts with a straight look at a very reachable basket, made only slightly harder by a fairly generous, early triple mando. By #2, you are already twisting through trees and brush, where you will stay for most of the rest of the round. The designer simply insists that you must be able to throw a 50-60 meter low tunnel shot, and if you can do this, the two of you should get along just fine for the next hour or so.
When you do break out into the open, you will need to be careful of your footing on the uneven terrain. I reminded myself before I started it is usually better to just go down than to ask a twisting ankle to straighten you back up once you stumble, and this probably saved me a broken bone when eventually, inevitably, I fell. For all the lumpiness of the fields, they are pretty soft in most places. The pits are big enough to hide a disc though, so I spent some time looking for a couple that ended up being right under my nose.
I enjoyed the elevated baskets on 7 and 15 (IIRC on the latter). Otherwise the course is basically flat.
Between this course and its near neighbor, Hveragerdi, Selfoss is the far more polished course. The tee areas area turf and smallish, but Hveragerdi lacks any improved surface at all. For reasons I can't quite figure out, I liked Hveragerdi a little better, but almost by almost every objective measure, Selfoss has more to offer. They are close enough for an easy daily double if you are in the area.
Having just come from the Netherlands and Belgium, I can't help but notice how much more vibrant the disc golf scene is in Iceland, which is bespeckled with courses all around its perimeter. Weather conditions can be the epitome of challenging—perhaps this is why courses trend shorter, more woodsy—but you could spend months here bagging courses and not finish the job. Maybe you should?