Open Rune Gates to several different destinations, or worlds. After many long journeys and much discussion with sources both informed and uninformed, I have finally been able to answer some of the questions you put to me at the beginning of my errand, and more answers will be forthcoming within the next few months. Remarkably, these gates are still functional even in the wake of the Turning and the subsequent sundering of the World. Whether or not the other fragments remain habitable of hospitable remains to be seen. The Magi and Scholars here at Ondiphel speculate that perhaps the pylons were originally built as conjuring devices, designed to allow communication or travel to other universes, beyond the Void.
Evidence is scant, and conflicting theories abound.
I have been able to answer another question, however, and I believe you will be quite satisfied to learn of my discovery. Strong evidence now contradicts Magister Trumbo's theory that the pylons were built by the Elves in the Age of Twilight. I have found an ancient Elvish tome in here in Ondiphel's library that dates from early in the Age of Twilight, well before the rising of the Dragon. Whatever ancient race of force is responsible for their construction, it was not the Elves. I think you have won your long argument with Trumbo at last.