From cutting through the countryside to connecting a country’s great cities, the world’s best railway journeys offer entirely new perspectives on a destination.Train travel always delivers plenty of magic. Sometimes it’s in the cars, as you meet fellow travelers, or as you eat and sleep with the sound of wheels rolling on the steel rails beneath you. Sometimes it’s outside, in the landscape the train traverses – offering an adventure, an experience, an insight into the heart of a nation.Our upcoming book,Amazing Train Journeys,rounds up the world’s greatest railway rides. Pulled from its pages, these 24 train journeys are truly first-class.1. The Reunification Express, VietnamStart:Ho Chi Minh CityEnd:HanoiDeparts: DailyDistance:1072 miles (1726km)Duration:Two daysThis is one of Southeast Asia’s best-loved railways – and one of themost epic overnight train journeys in the world.There is no more atmospheric way to haul into Vietnam’s twin metropolises as this train rattles through histo...