The land which contained the Grail Castle.
The land was called Terre Salvaesche by Wolfram, and the Strange Land, or Listenois, by the Vulgate romances. In the Vulgate sources, it became the Waste Land when the Fisher King or Maimed King received his wound.
See also
Munsalvæsche | The Legend of King Arthur
Sources
Parzival | Wolfram von Eschenbach, 1200–1210
Vulgate Queste del Saint Graal | 1215-1230
Vulgate Estoire del Saint Graal | 1220-1235