There is an amazing fact about the sea.
If you ever see squares forming in the sea, I strongly advise you to leave the water immediately as there is a good chance that your life is in danger.
Did you know that there are actually different types of waves? At the beach, we're obviously used to seeing this type of wave hitting the coast.
Instead, this natural phenomenon is known as square waves or cross sea waves, and it is extremely dangerous.
Square waves are created when the wind from one side continues to move in the same direction and collides with the wind moving from the opposite side, causing these waves to flow at an angle, creating a square pattern in the sea.
This wave appears completely harmless on the surface, however, square waves create extremely dangerous, potentially deadly, subsurface currents. Theoretically, square waves have the potential to capsize massive ships: ships are designed and engineered to hit the waves head-on, but they cannot stay afloat and stable if the waves strike the vessel from multiple angles.
The square wave phenomenon occurs most frequently on the island of Ré, located on the west coast of France.
These waves occur rarely, but it's just to let you know, so be careful.