Last weekend, Jó and I went for another hike on Esja in the lovely weather. We didn't take the main hike (from the bus stop) which we took last time, but rather decided to avoid the crowds and go on another spot in the moutains. We settled on a hike going up to Móskarðshnúkar, a set of 3 rhyolite peaks in the south-east of Esja. We hiked the middle peak (a bit under 800m of elevation).
The hike was quite interesting, especially towards the top where the slope is quite severe and where stepping through the rhyolite stones feels like getting trapped in glassy sand. Rhyolite is a light, almost glassy volcanic rock that can take on yellowish colors. Those three peaks are a typical example, the amazing Landmannalaugar is another.