sahara desert hills, valley and clouds

algeria algerie algerien algerije art bakke blanc ciel clouds colore coloured duinen dunes desert dunen engravings ferie ferien hemel heuvel hills himmel hugel natur nature paintings pierres reise reizen rejse sable sahara sand sky skyer steine stenen stones tadrart tal travel vacation vakantie vallei valley vallee voyage white woestijn wolken wuste zand