Imagine stumbling on a 7,000-year-old wall underwater—almost 400 feet long and weighing as much as 3,300 tonnes! That’s what a team found off the coast of France. This Mesolithic mega-structure could’ve been a fish trap, a boundary, or even a ritual site. No one knows for sure, but it’s blowing archaeologists’ minds. Makes you wonder what other secrets are hiding under the sea, right? #History #Archaeology #UnderwaterDiscovery