― Mini Cruise Karlskrona - Gdynia, Expectations ∙ This Sunday I went on a mini cruise with the ship Stena Line Vision from Karskrona here in Sweden to Gdynia in Poland. The trip was two nights on the ship and one day in Gdynia. Though I had been in Gdynia a few times before, it was many years since my last visit. So I was quite curious to see if the city still looked as I remembered it? Which it both did and did not. .