 Some of these rivers lead to the dwelling of the gods (such as Gömul and Geirvimul), while at least two (Gjöll and Leipt), reach to Hel.Hvergelmir is mentioned several times in the "Prose Edda".In "Gylfaginning", Just-as-High explains that the spring Hvergelmir is located in the foggy realm of Niflheim