Thanks @Frederic and team for this drive! Three distinct areas I had not been to before, they were interesting dunes as they seemed to be quite ‘erratic’ formations, no repeated same-shape dune formations, which kept the drive interesting and unpredictable.
Not clear which one was the good, the bad or the ugly in the end. But if you ever want to continue this theme in style, do so when you visit Spain: the circular shaped Sad Hill cemetary where the good, the bad and the ugly have their final showdown is to be found close to the Madrid-Burgos highway, and has recently been restored by volunteer movie-fans of the region:
https://maps.app.goo.gl/EhWmf6MpQkd8cYhy7?g_st=ic
(area has become much greener since the movie was recorded)