What is the longest train ride in the world?

Can you imagine traveling 13 countries and 18,755 km without getting on a plane? According to estimates, completing the so-called 'world's longest train trip', without getting off at any stop, could take up to 21 days, without counting delays or other extra problems.The longest train trip in the world starts in Portugal This multi-connection train journey offers a sustainable alternative to air transport, with a significantly smaller carbon foot…