These craters are usually named Eldborg (singular) at the foot of Mt Geitahlid to the east of the abandoned farm Krysuvik.  The so-called South Shore Road passes between them and the short trail to the top of Stora Eldborg starts from there.  Those are symmetric and beautiful scoria craters at the southwesternmost end of a crater row, which created lava fields stretching all the way to the sea.  The Litla Eldborg lava field, which is considerably smaller than the one created by Stora Eldborg, lies on top of it.