Coach from Santiago to Mendoza over the Andes, has to rank in the top league of coach journeys. It doesn't look very far on the map but it took about five hours. Like flying, it's an ear-popping experience. It felt like we'd been up and down three times in a plane. The mountain landscape is on a vast scale. Snowcapped summits mounted upon vertiginous rocky cliffs and hectares of arid scrub-filled stoney desert. Many times the coach passes close to roadside off...