Bay of Spheres

The bay of spheres is in the Southern edge of the continent.  It is East of the Calidar Mountains and South of The Eternal Castle.  Named due to it's source of Viridet mined from underwater caves.  Upon striking a vein of Viridet and exposing it to the ocean it forms into a green sphere and hardens before floating to the surface.  This Viridet seems to have anti-planar transport properties and is used in the Great Wall.  The exact specifications of how it is used is a closely guarded Empire Secret.