The Floating City of Miraa flies high above the surface of Vallene. Known only to several scholars in the Citadel, it was once the home of an ancient people now long extinct. It is unknown whether they were related to the Correa, or perhaps even the twin gods. The city can be tracked if one knows where to look in the sky, but none living have reached it.
Miraa served as a containment device for the frost giant's cataclysmic storm. The twin gods built it in ancient times, containing both the storm and the frost giant capital. It is now populated by the remnants of its ancient protectors, now altered by biomechanical means to create living constructs capable of maintaining the city forever.