A military structure designated 'FA Peilstand (f)' located near the coordinates in Brittany, France. The term 'Peilstand' is German for a bearing or direction-finding station, suggesting a possible World War II-era German military installation, potentially for radar or signals intelligence. However, the provided web search results contain no specific information confirming the existence, function, or historical context of this site.
Further local historical or archaeological research would be required to verify its nature and significance.