Druid’s Log, December 3: “Hitching a ride on a frost giant’s back is both entertaining and eco-friendly.” First, the greenhouse-gas emissions are almost nil; you get to hear all about the many splendid beauties of Freyja; the wind noise is minimal, aside from the occasional graah; and since you don’t have to steer, you can simply enjoy the scenery from ten feet above the ground. On the downside, they smell like ice cubes made of sweat instead of water.

