Write a short summary of the passage.

This is the passage:
The most famous description of Valhalla in Old Norse literature, that of Grímnismál, portrays it as being located in Asgard, the gods’ celestial fortress.

However, other lines of evidence suggest that it was at least sometimes seen as being located underground, like the more general underworld.
system
maarg kaa ek chota saransh likhen.

yah maarg he:
puraane norse sahitya main vallaah kaa sabase prasiddh vivaran, grimenismal kaa, ise bhagwaan ke khagoleey kile, asaguard main sthit hone ke rup main chitrit karata he.

haalanki, sakshya kii anya panktiyon se pataa chalata he ki yah kam se kam kabhi -kabhi bhumigat sthit hone ke rup main dekha jaataa tha, jaise ki adhik saamaanya anderworld.
user
Grímnismál vallaah kaa sabase prasiddh chithran he, jo ise asaguard main dhundta he, lekin anya siddhanton kaa kahana he ki yah bhumigat tha.
assistant
<|system|>
</s>
<|user|>
maarg kaa ek chota saransh likhen.

yah maarg he:
puraane norse sahitya main vallaah kaa sabase prasiddh vivaran, grimenismal kaa, ise bhagwaan ke khagoleey kile, asaguard main sthit hone ke rup main chitrit karata he.

haalanki, sakshya kii anya panktiyon se pataa chalata he ki yah kam se kam kabhi -kabhi bhumigat sthit hone ke rup main dekha jaataa tha, jaise ki adhik saamaanya anderworld.</s>
<|assistant|>
Grímnismál vallaah kaa sabase prasiddh chithran he, jo ise asaguard main dhundta he, lekin anya siddhanton kaa kahana he ki yah bhumigat tha.</s>
