My next international trip varies, as I have so many ideas. However, my most consistent one is a trip to the Mediterranean coast of France. Marseille, Nice and Monaco will all get a visit after seeing the photos from a trip made by a fellow travel enthusiast at work. I was also inspired by some cab ride videos on TGVs, it looks like a decent ride down the fast lines.
So my plan right now is to make my way to London and take a Eurostar to either Paris or Lille and change for a TGV to the coast. Easily a full day of travel in both directions, and a few days exploring the area looks like it would be really enjoyable.
That all being said, I really want to go back to Poland and do some trains over there, so that I can see more of the country rather than Kraków and the trip to/from the airport. I've watched lots of cab ride videos from the Netherlands too, and my other main choice would be:
Early morning IET to London
Eurostar to Rotterdam Centraal
NS Rotterdam Centraal to Maastricht
Been way too many years since my last ride on an ICMm or a VIRM! I think it's coming up to 8 years actually, so probably the same since my last Eurostar adventure!