MSN posted a slide show naming 21 “Thrilling Train Trips Around the World” here: http://www.bing.com/travel/content/search?q=Thrilling+Train+Trips%3A+The+Rocky+Mountaineer&cid=blog1145293
I don’t know if they are all thrilling and none of them actually provide service around the world, but the list does include include rides through some of the most incredable scenery on earth.