All Elves (with the exception of the mixed-blood Bair) were born there, as Elves cannot reproduce outside of their home plane. It is considered a peaceful and civilized place, and lacks the passionate vibrancy that some Elves find attractive in Mithgar. There are several places where Adonar can connect to Mithgar, and thus allows for easy travel between planes. Adonar does not seem to have any oceans, since Aravan had never seen one until he came to Mithgar.