Off-Topic /
Trans-Siberian railway the most legendary ride of a lifetime [13]
Bloody dangerous with decrepit planes and drunken pilots. Mind you, Boeing aren't that safe either and both beat some of the planes I've been on in Africa that have bog roll stiffed into the ceiling to unsuccessfully stop them pıssing water from the a/c. The kind of airline that isn't allowed to land in some African countries, never mind in Europe.
Reading the Trans Siberian railway stuff, trains really are the best way to travel. I'd do it if it wasn't where it is. There are still some long distance ones that are cheap. Not as long as that one but still good. Warsaw to Paris is doable via Cologne, but is expensive. There used to be a Moscow or Petersburg to Nice/Monaco train that went through Poland. You could board there but it was hellishly expensive.
I've done the journey from Belgium to Poland via Eindhoven, Munster or Dortmund and Berlin a couple of times. Once it was about €100 and once about €130?. Probably cheaper if you travel on a quiet day and book well in advance. You can have lunch in a German restaurant car and dinner in a Polish one, and they both have proper kitchens and nice food.
Sadly the cargo ship that had a few cabins and went between Poland and the U.K. no longer takes passengers. I think it was about 3 days, sailed once a week in each direction. When I last checked a price, it was about £250. The ship still sails from Gdynia but unfortunately the port in Immingham no longer has passenger facilities or immigration staff since the ferries have all stopped there. It was disappointing to learn since I'd always fancied making the journey that way.