This latest railway route in Switzerland was opened in November 1999, taking its passengers through the beautiful Engadine valley near the Austrian and Italian borders, through the scenic Prattigau and then the broad and densely forested Rhine valley. The route of this line is not just a thing of natural beauty but also in part a huge feat of engineering - with the longest metre-gauge tunnel in the world. The journey continues with tours through the old village of Scoul and offers a chance to take a closer look at the traditional Engadine architecture. Travelling onward to Davos for some wintertime sporting fun, we then head for the ski resort of Klosters, a favourite with the British royals and the penultimate stop on our trip. Journey's end is Lanquart, where the vineyards and easy-going lifestyle form a tranquil final destination to an exhilarating ride.