Grand Turk was once one of the world’s premier salt producers. The drying ponds, abandoned about 50 years ago, still dominate the island. “What you need for salt,” says Sherlin Williams, former head of the local preservation society, “is sun and wind.” Which is pretty much what you need for a beach vacation too. I’d point that out, but he’s on a roll — explaining how it can take up to three months to make salt, time spent doing little but watching the speed at which the water disappears. But it occurs to me what you’re really doing is paying exceptionally close attention to the world’s rhythm and the effect of weather on the planet’s skin.