If you plan to travel between Copenhagen, Hamburg, Frankfurt and/or Basel, there is a City Night Line overnight sleeper train service called Aurora that runs daily. Other sleeper services are available to Amsterdam.
Kolding is a seaport situated in Southern Denmark. The town is a transport and commercial centre, with many industries geared towards shipbuilding.
The City Night Line service between Amsterdam and Copenhagen takes place aboard the Borealis sleeper train. A restaurant car serves passengers between Hamburg and Copenhagen. There are two border crossing points at Emmerich and Flensburg.