Kringilsárrani is an important grazing ground for reindeer. It contains extraordinary evidence of glacier surges where Brúarjökull, an imposing outlet glacier, has advanced and retreated. The largest surges have advanced 5-10 km. Glacial relics are clearly visible, and many drumlins litter the area.
This is a unique tract of land, for the most part vegetated, and well-known for its toadstool clusters. However, the area of ground supporting plant life has diminished somewhat since work began on the Hálslón Reservoir, part of the Kárahnjúkar hydropower plant.