Alsion is a modern waterfront complex that combines a concert hall, university facilities, research spaces, and public cultural events. It sits by the Alssund, giving Sonderborg a contemporary counterpoint to the castle and older harbour areas.
For travellers, Alsion is most relevant when there is a concert, lecture, or festival event on, but the building also shows how the town has reused its waterfront as an education and culture district. It is an easy walk from the centre and pairs well with a harbour circuit.