This symmetrical slag crater is located near Mt Helgafell, about 7,5 km from the town Hafnarfjordur.  The lava, which ran from it about 7,200 years ago, branched into the bays Hafnarfiord and Skerjafiord.  The name of the 18 km square lava field is Burfellshraun, but many other names have been attatched to its different parts.  The crater is easily accessible from the road through the recreational area Heidmork.