Travelling with the trans Siberian railway is an extraordinary way of discovering Russia and its culture and it is one of the most mystical railway of the world. It is also the kind of experience that really makes you get out of your everyday life.
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Eurostar from St. Pancras to Amsterdam, then on through Cologne, Berlin, Warsaw, Minsk, and Moscow. Then it's the Trans Siberian Railway going through Novgorod, Perm, Ekaterinberg, Omsk, Novosibirsk, Krasnoyarsk, Irkutsk, leaving Russia and going down through Mongola via Ulan Bator before arriving in Beijing. Connecting train goes down to Shanghai and then there's a ferry to Osaka. Start to finish on the TSR takes 6 nights, plus the connecting journeys. For the next steps see "Visit Japan (for more than seven hours)"!