![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/9/9d/Thurston_Lava_Tube.jpg/640px-Thurston_Lava_Tube.jpg&w=640&q=50)
Hraunhellir
Hellir myndaður í eldfjallabergi / From Wikipedia, the free encyclopedia
Hraunhellar eru alls konar hellar í hrauni þó aðallega 'hraunrásir' neðan yfirborðs jarðar.
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/9/9d/Thurston_Lava_Tube.jpg/640px-Thurston_Lava_Tube.jpg)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Manjanggul_in_Jeju.jpg/640px-Manjanggul_in_Jeju.jpg)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/5/5c/Vidgelmir-05.jpg/640px-Vidgelmir-05.jpg)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/5/57/Lei%C3%B0arendi_Lava_Tube_in_Iceland_-_2013-04-26_D.jpg/640px-Lei%C3%B0arendi_Lava_Tube_in_Iceland_-_2013-04-26_D.jpg)
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/f/fe/Lei%C3%B0arendi_Lava_Tube_in_Iceland_-_2013-04-26_F.jpg/640px-Lei%C3%B0arendi_Lava_Tube_in_Iceland_-_2013-04-26_F.jpg)
Hraunhellar eru alls konar hellar í hrauni þó aðallega 'hraunrásir' neðan yfirborðs jarðar.