Herðubreiðarlindir and Grafarlönd are oases created in the Ódáðahraun desert by springs flowing from under the lava fields and providing water for plants to prosper. Often called the Queen of Icelandic Mountains, Herðubreið is also considered to be Iceland's national mountain. It is a volcanic table mountain which was created by repeated eruptions when the land was covered by ice up to 1,500 m thick during the last Ice Age glaciation.