The Dykhus sits on a small mound just metres from the Old Lighthouse, in the historic whaling quarter of Borkum. Its name refers to the dike at whose foot it stands — one of the earliest dikes built on the island. Inside, the museum traces Borkum's history from its earliest settlement through the whaling era and into the modern age as a North Sea health resort.
The centrepiece is a complete sperm whale skeleton suspended from the ceiling — a powerful physical reminder of what brought wealth to this island for centuries. The museum also covers the island's position as a Nordseeheilbad (North Sea spa), with exhibits on the history of thalassotherapy and the development of Borkum's hotel infrastructure in the 19th century. Compact and well-curated, it's worth an hour of your time even if maritime history isn't your usual interest.