Fort bij IJmuiden
Velsen, Netherlands
Fort IJmuiden is a former fort, now heritage site and event location in IJmuiden North-Holland. It protected the entrance to the North Sea Canal. The fort was originally located north of the canal, but by the construction of a new branch, it became an island. Most of the old fort and some World War II additions have been preserved. A rare armored emplacement that protected five heavy guns, is still in place.
Fort data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).