[1] Eldborg í Bláfjöllum is a scoria cone, part of a group of three such small volcanoes.

[2] The crater group as well as the impressive lava channels and tubes nearby are products of eruptions within the Brennisteinsfjöll volcanic system around the year 1000.

[6] The area of the Natural Monument is defined as: from the Road Bláfjallavegur, 200 m from the foot of the crater group to the southern foot of the mountain Drottning, over the ridge of this mountain to its northern tip and from there back to the road.

[7] Not far from the scoria cone group, two subglacial mounds are to be found, Stóra-Kóngsfell [ˈstouːra-ˌkʰouŋsˌfɛtl̥] (602 m) and Drottning [ˈtrɔhtniŋk] (410 m).

The smaller mountain in the vicinity was first called "Litla-Kóngsfell" ([ˈlɪhtla-] "Small King's-Mountain") by the farmers driving home their sheep in autumn, but the skiers of Bláfjöll called it "Drottning" (Queen), [8] and this is now its official name.