You cannot actually fly through the realm of Nuanor in Revelation Online at the moment. The game's testing is scheduled to begin in the fall, and if you hadn't gathered from the temperature and the month, it is currently summer. But you canwatch a new tour video flying you through the seamless zones, narrating the experience just so you know exactly what you're looking at.
The flythrough video just below shows off three cities and looks at the inhabitants of the various regions, albeit in all the depth you can expect for a video that clocks in at just under four minutes. Still, it's the next best thing to actually exploring the area.