The Highlands of Iceland cover most of the interior of Iceland. They are situated above 400-500 meters and are mostly uninhabitable, because the water precipitating as rain or snow infiltrates so quickly into the ground that it is unavailable for plant growth, which results largely in a desert surface of grey, black or brown earth, lava and volcanic ashes.
Most of the numerous glaciers, such as Vatnajokull, Langjokull and Hofsjokull, are also part of the Icelandic Highlands.
Vegetation is only found on the shores of the glacier rivers. There is also the danger of glacier runs.