Six of us, three generations, ten days and one very full car. Here's how we spent Christmas to New Year road-tripping through Spain with the kids and Amma Appa: turrón in Alicante, the Alhambra, snow tubing in the Sierra Nevada, a boat ride down an underground river, and New Year's Eve in the pouring rain in Valencia. Our full itinerary, where we stayed, and what we'd tell you before you go.