The dunes in Death Valley National Park are extensive and lead you quickly into a wilderness when you drop down off one or two ridges and suddenly it is much more quiet, hotter and you are not completely sure - except for your footprints, which way is back. It was disconcerting to think you might have to walk across acres of this - not that we did but what a challenge. I was also interested in the vegetation. Did not really expect too much but there were several shrubs and a few grasses. It was blooming time for the small trees and the yellow blossoms were attracting lots and lots of bees.