The Maisy Battery is a group of World War II artillery batteries that was constructed in secret by the German Wehrmacht near the French village of Grandcamp-Maisy in Normandy.
It formed a part of Germany's Atlantic Wall coastal fortifications and was the principal position of defence for that area. It was responsible for the defence of the sector between the Longues-sur-Mer and the St Marcouf batteries. It covered the sectors around both Omaha Beach and Utah Beach, which were two of the five landing sites for the Allied invasion of Normandy in June 1944.: 143, 286
Wikipedia https://en.wikipedia.org/wiki/Maisy_battery
Official Website http://www.maisybattery.com/
Coordinates 49°22'31.66" N -1°3'40.248" E