Longest train journey without changing trains:
The longest train trip on Earth is the Trans Siberian Express. The route starts in Moscow and ends in Vladivostok. To get to Vladivostok from Moscow takes 6 days, 5 hours and 19 minutes. It stops on 120 stations and crosses the distance of 9300 km.
Longest train journey with changing trains:
Among the most longest train trips is to travel from Portugal to Vietnam. The distance of the journey is 10.566 miles / 17000 km.
Do you know other similar long lines in the world ? If you know more please write a comment.