Ragnthar is a mystery within a mystery. Modern scholars agree: there's just no reason for Ragnthar to exist in the strange way it does. And that is about all scholars can agree upon when it comes to the strange case of the Ragnthar ruins. Even laypeople know that the Dwemer, or Dwarves as they're more commonly known, vanished from the face of Tamriel. The reasons or cause behind their disappearance are a matter of much speculation … a subject for numerous other texts. What is known is that by stepping across the threshold into Ragnthar, you leave Nirn. And no one knows why.