The first ever night train I went, about 25 years ago, on was from Berlin to Malmo. Early morning, I woke up to the feeling of my bed swaying and looking out of the window realised 'hang on, they've put the train on a ferry'.

I had no idea that trains got put on ferries, although I had been puzzled by the way the route on the route map crossed the sea but had assumed it was just to make the diagram simpler. It was quite a surreal thing finding myself unexpectedly on a train on a ferry. It was nice though as you could go and wander round the ferry and it was quite fun seeing it go off the ferry which had special train tracks on it onto the normal train tracks on the land.