We went exploring the Camargue today, and came across these giant mounds of salt being processed south of Salin de Giraud, which looked a lot like the ones in Doug Aitken's app, commissioned by Maja Hoffman's LUMA Foundation in Arles. It turns out to be next to some evaporation fields which are the color of The Great Salt Lake at Rozel Point, the color which inspired Robert Smithson to choose the site for his most famous work. This panorama shows these two artists' fields together for the first time.
The obvious thing, then, is to combine the two landscapes, creating a spiral jetty out of mounds of pure salt in the pink evaporation ponds. It won't last, of course, but that's what entropy's all about, and public art. To the extent such a word is applicable in this site and situation, the LUMA Foundation is the obvious partner and platform to make this Phantom Spiral Jetty appear.