evidence: One of many unforgettable things about Sri Lanka is the variety and intensity of the color green throughout the year. And for train aficionados, there is no better way to appreciate the country’s full, verdant spectrum than an all-day rail journey from Colombo’s urban gardens at sea level to tea plantations in the Hill Country, via brain-spinning sensory doses of jungle and forest, paddy field and palm tree, mountain and valley, national parks…and human habitation, too. Expect to move slowly – and enjoy one of the most scenic train trips in the world.