THE MAKER: Visions of Dune
Fremen Dew Collectors
I took a bit of liberty with the description in the book, I had seen an episode of Bear Grylls , were he mad a moisture trap with rock sin a pit covered for shade. The idea here that they have carved a big pit, the many columns designed to increase the surface area to capture due when the outside moisture hits the cool rock. Fremen collectors suck up the gathering moisture.