Aldeyjarfoss is a waterfall 85 kilometers south of Husavik along road F26 (Sprengisandsleið or Sprengisandur), a road that leads through the Highlands and ends on road 1 in the southwest, not far from Hvolsvöllur. From Goðafoss follow the road along the west bank of Skjalfandafljót River past the farm called Mýri where the road makes a sharp left hand turn. Let yourself through a gate but make sure you close it behind you to prevent animals from wandering off.
The river Skjálfandafljót drops down over 20 meters. Though only 20 metres in height, Aldeyjarfoss waterfall has symmetrical features and geologically interesting surrounds. Tumbling through a narrow passage into a wide basin, the concertinaed black basalt columns provide a stark contrast against the thrashing white foam, making it oft considered one of Iceland's photographic gems. The basalt belongs to a lava field called Frambruni or Suðurárhraun, hraun being the Icelandic designation for lava.
The source of the river Skjálfandafljót can be found at the Vatnajökull glacier, one of the largest glaciers in Europe. In summertime, when temperatures rises, the river Skjálfandafljót can become quit voluminous.
By following the river from Vatnajökull to Skjalfandi (Bay) you will find several interesting and famous waterfalls like: Goðafoss, Æðarfossar, Hrafnabjargafoss, Barnafoss and Ullarfoss. 100 meter upstream from Aldeyarfoss you will find another small waterfall Ingvararfossar.