Somewhere in the Rocky Mountains, where it's so high in altitude, and the air is significantly less dense, that the air molecules don't hold onto water like it can at lower altitudes... so it's dry because it's so high!
Yet sometimes, if you're lucky, amongst all of the rocky soil and sand you can find a dew drop in the morning.
And sometimes, it can be found on a fallen Aspen leaf glistening in the sun like a crystal...