A military bunker structure located near the given coordinates in the Netherlands. The specific designation 'Sockel WR' suggests a possible German military origin, as 'Sockel' (base/mount) and 'WR' (potentially Widerstandsnest or similar) were terms used in German fortification nomenclature during the Second World War. The Netherlands was part of the Atlantic Wall fortification system.
However, the provided web search results contain no information confirming the exact type, construction date, armament, or function of this particular site. Further local historical or archaeological research would be required to verify its details and historical context.