There cannot be many places where you can get a view like this from a train window. Here, we are actually traversing Peberholm, a man-made island in the middle of the Øresund strait between Denmark and Sweden. The train has just emerged from a tunnel under the sea and is soon to make the rest of its crossing on the stunning Øresund Bridge. Trains between Copenhagen and Malmö make their way every 20 minutes but the crossing also provides a valuable motorway link.