Completed my circle round Germany with a trip alongside the Rhine. Some stunning scenery as the train snaked its way up the river valley. Many castles clinging precariously to ravines high above the river, whose banks were covered in vineyards. A relic of the Romans apparently, the vineyards not the castles. The Rhine was about as far east as they got. Avoided Worms for obvious reasons and stayed in the city of Mainz. Another city with a grand cathedral and some great Roman remains, apparently. They were closed for renovation. Back now in Cologne and heading west tomorrow.