Isle of Garmr
The Isle of Garmr is an island mentioned in Imcandoria's fall. It supposedly lies somewhere in the Northern or Lunar Sea, possibly near or close to Acheron. The island housed an Imcando dwarf civilisation before it was destroyed by a horrible evil and was presumably part of a greater region refered to as Imcandoria. It was also home to a group of unspecified giants as well as an Auspah tribe.
Freja, an adventurer and member of the Myth's Guild, explored the island once, and brought back the transcript of Imcandoria's fall. She is planning an expedition to Acheron, but also mentions the Isle of Garmr, hinting the two locations are near each other.