Groom Lake

This is just a very interesting subject.  I have lived in the Mojave desert and I look forward to the government turning this into a national park!
A dry pluvial lake bed of parched clay, its alkaline surface smoothed to glass-like flatness from desert winds sweeping water from winter rains back and forth in a timeless cycle over a period of fifteen million years.


From:

http://area51specialprojects.com/groomlake.html