In recent decades, there has been a certain scepticism about earlier analyses of the indigenous religions of Fennoscandia that compared, for example, Sami and Scandinavian traditions and asked questions almost exclusively about origin. This is now changing and the leading researcher in the new endeavour of com-paring and relating Old Norse and Sami religious traditions is the linguist Eldar Heide. In his contribution he returns to the earli-er discussion about ancestor mountains with a new comparative analysis of the Icelandic Helgafell and the South Sami saajve com-plexes. He presents the sources, characterises the two complexes, and asks whether or not Helgafell and the saajve mountains were regarded as realms of the dead. Finding connections and similari-ties, he suggests how they could be understood.