Sometimes, I wish I was an artist. I’d specialise in train-window vistas. We’ve just travelled through the snowy Bavarian countryside to Germany’s deep south, where Neuschwanstein (‘Noik-sh-wonn-sty-n’), the inspiration for Disneyland’s Sleeping Beauty castle, perches on the edge of a rugged gorge in the foothills of the Alps. It’s early January and the three ‘viewing…