THE DESERT SPEAKS continues the search for the highest and driest part of Argentina, beginning in the colonial city of Salta. Viewers tour i ts downtown market, stroll its streets and glean interesting informati on from the local guides, then travel upward through distinctly differ ent biomes, including a fog forest and a beautiful painted desert, bef ore reaching the pinnacle. At more than 13,000 feet in elevation, it i s the highest and driest northwest Argentine desert.