Haderslev is a small port town in southern Jutland, sitting at the head of the Haderslev Fjord. Most travellers pass through on the train — it is a rail junction — but if you step off, the town rewards a few hours of wandering.
The Haderslev Cathedral (Haderslev Domkirke) is the main draw, a Gothic brick church with origins in the 13th century. The Haderslev Museum covers the archaeology of southern Jutland and the complex national question of this borderland — the region changed hands between Denmark and Germany three times between 1864 and 1945, and the town bears the marks of that history. The ruins of Haderslevhus castle sit on a hill above the Haderslev Dam, a medieval lake that runs through the centre of town and makes for pleasant walking.