Seinpaalduin offers a unique view of West, the port of Terschelling, the Green beach and the Noordsvaarder. In clear weather you can even see Vlieland at your feet. The southern point is called the Seinpaalduin, because of the semaphore that stands there. This semaphore provides shipping information on the expected strong winds on the mudflats by means of different colors of lamp light. The color codes of the semaphore and what they mean can be read in the beautiful bicycle route book "Sporen in het Zand" available at the Terschelling Tourist Office. The striking Seinhuisje stands on the adjacent Kaapsduin and was built shortly after the war as a sentinel station for the navy. This is a short walk to the Kaapsduin lookout point. A concrete path has been constructed here so that wheelchair users can also go up here.