A military bunker located near Plouay, in the Morbihan department of Brittany, France. The site's specific historical purpose, construction period, and current status are not confirmed by the available information. The region of Brittany has a long military history, including coastal defenses from various eras, but no direct connection to the named site is established in the provided data.
The German-derived name 'Wasser' (meaning 'water') is atypical for the region and its origin in this context is unclear without further local historical records.