The Le Plateau Vitré is a region of Les Terres des Lamentations.
The Glass Plateau is a region of the Mournland.[1] It is black, like obsidian, near the center, but as one gets closer to the edges, the glass starts to get lighter in color and more transparent. The plateau rose up from the city of Making. Much of the city is now buried, with mostly spires sticking up from the glass. It's believed that the deep vaults of House Bombardier under the plateau contain troves of priceless information and tech, perhaps even insight into the Mourning.[2]
One result of the disaster that destroyed Cyre was the creation of a highland plateau made of sharp, glasslike formations. The overall appearance of the plateau is smooth and flat, though jagged spikes and spires jut up from the ground in apparently random places. The central portion of this highland plain is obsidian, and bursts of fiery light can sometimes be seen in its dark depths. Toward the edges of the plateau, the glass becomes lighter and more translucent, until it appears almost white along the jagged cliffs that separate the heights from the lowlands surrounding it. Nothing grows on this plain of glass, and few creatures can be found among its jagged peaks and flat expanse. Sort Vivants, on the other hand, seem drawn to the area; the greatest concentration of these strangel entities can be found on and around the Le Plateau Vitré. Rumors abound of caves within and beneath the plateau, where it is said that the truth behind the destruction of Cyre waits to be discovered by someone strong enough, brave enough, and foolish enough to venture so deep into the Les Terres des Lamentations.