Many things happen in the desert so I can't be sure but I believe this cross was placed by artist Alvaro Enciso for a migrant who died here from exposure. Her body was reported in 2006 and she remains unidentified.
I believe this is a Flint and Walling Windmill (maybe a Model 37?) - I'm not an expert on Windmills but took note since I mainly see Aeromotor Windmills. As usual the Windmill still stands but the work is done by a solar powered pump.