The Royal Scotsman, Scotland
Scotland's Highlands are home to historic castles, picturesque mountains and lochs, and pretty villages and gardens, not to mention famous distilleries. The Royal Scotsman offers several routes, and tailor-made tours including golf and whisky journeys.
Maharajas' Express, India
This is, without a doubt, one of the best ways to explore India's northwest - the Maharajas' Express, one of the world's most luxurious trains, offers five routes, the longest of which take eight days. The Indian Panorama journey leaves from Delhi and visits Jaipur, Ranthambhore, Agra (where you can visit the Taj Mahal), Gwalior, Orchha, Khajuraho, Varanasi and Lucknow before returning to Delhi. Think fortresses, palaces, jungle, wildlife, and plenty of opportunities to view the Ganges.
The Ghan, Australia
Travelling between Darwin in the Northern Territory and Adelaide in South Australia, the Ghan train has just updated its route from three days, two nights, to four days and three nights. You'll alight in Katherine, Alice Springs and Coober Pedy as you make your way through the heart of Australia, but you won't just see miles and miles of red dust: there's plenty of varied scenery and lots of wildlife.