I'm reasonably satisfied with the way the Wasteland Tile came out. There are no desert tiles in the original Magic Realm game, and this tile would be accompanied by four other tiles, including the Ruins, Barrows, Heath and Midden. The Ruins tile from the original Magic Realm would be moved to this set, and another Caves tile would be developed to take its place with the others.
Each Ruins of Arcadia tile has a single underground clearing.
These five Ruins tiles would, collectively, be the "Ruins of Arcadia" expansion set. The other three sets would be the "Enchanted Woods", and Hills and Swamps expansions that I have not yet come up with names for.