Kolmanskop was built on diamonds and emptied by them, and the Namib has been moving in ever since. It stands in the desert of southern Namibia, inside a diamond area still off limits, and it went up after a railway worker clearing the line found a stone in 1908. Within a few years three hundred and fifty people were living on the richest ground on earth, in a town with a ballroom, a hospital and an ice factory that delivered a block to every door each morning. There is no fresh water for hundreds of kilometres in any direction. Every drop of it came across the desert by rail. Then richer fields turned up to the south, and the families went.
What stayed behind was the wind. A strong southerly runs off this coast most of the year, pushing sand through every broken window and open door. The filling has never finished. One long corridor keeps its green wainscot and its row of white doorframes with nothing under your feet but rippled dune. In the larger rooms the sand does not just cover the floor, it crests: a slope climbs to window-sill height and slides down the far side, every ripple picked out by the arched windows. The photograph everyone comes for is a doorway between a pale-green room and a blue one, with a hand-painted fruit frieze still up over the frame. A tongue of sand lies across the threshold, smooth only in the first hour, before you or anyone else has walked on it. Where the drift has banked to a sill, you lean into the opening and the sand indoors runs straight out to meet the sand outside. From the edge of the site you see it as it is: a few dozen roofs, a rusted mine shed and a line of workers' quarters on a plain that runs empty to the horizon. The name came before the diamonds. A transport driver left his ox wagon on the rise opposite when a sandstorm caught him, and the sand that stopped him never stopped arriving.