The Spelltower of Dremetar

As you approach the City State of Dremetar, you can see the Spelltower for miles upon miles. It dominates the view, sparkles in the setting sun. As you draw close to the walls, you may even catch a glimpse of a moving figure behind the great arched windows at the summit. But ask any inhabitant about the Spelltower, and you will rarely receive more than a grunt in reply. Point it out to them, and they will only look at quizzically before glancing away and changing the subject. Is there some enchantment upon the city, that makes its inhabitants ignore its most prominent landmark, or does the tower have some other secret that the people are loathe to dwell upon?