Some people just don’t get it about elves, not to mention trolls and ogres, and think that these creatures have to be empirically present or not exist at all. With that kind of thinking, they just won’t see an elf or look into the other realm. However, if you go to the Buðahraun on Midsummer Night, you will find elves in every collapsed volcanic hollow, in wondrous variety.
Every is a doorway, through which the other world spills. Usually these are dangerous places, but on Midsummer Night they are full of delights, and then the worlds begin to fall out of alignment again.