WordNet (r) 3.0 (2006):

Death Valley
    n 1: a desert area that is part of the Mojave Desert in eastern
         California and southwestern Nevada; contains the lowest
         point in North America

Moby Thesaurus II by Grady Ward, 1.0:

23 Moby Thesaurus words for "Death Valley":
   Arabia Deserta, Sahara, barren, barren land, barrens, brush, bush,
   desert, desolation, dust bowl, heath, howling wilderness, karroo,
   lunar landscape, lunar waste, outback, salt flat, waste, wasteland,
   weary waste, wild, wilderness, wilds