Blöndulón
North of Hveravellir and the Kjalhraun lava field is the expansive, milky-green Blöndulón lagoon—a man-made lake formed when the Blanda river was dammed together with the source of the river Kolkukvísl for the Blanda hydroelectric power plant, which came online in 1991. The lagoon forms the third-largest lake in Iceland.