Try not to mourn the holidays you won’t be taking this summer. We all need to get used to travelling less anyway. — It was early evening, one day last August, when I found myself standing on a rocky buttress, cheering the sudden onset of clouds. A fresh weather-front was barrelling in over the Altai massif, and now the clouds were pluming at the mountaintops, draping columns of rain. By now, after four…