Caption This for 10/12/2018

This is the French lighthouse where they invented the square-wave generator...

Explanation from source:

There is no shortage of special effects on our digital screens these days, but believe it or not, there are equally peculiar phenomenons in nature that seem like work of technology rather than Mother Nature.

Isle of Rhe in France is one such destination which is known for being romantic, as well as bizarre. A tiny island measuring just 19 miles long and three miles wide, Isle of Rhe is located on the west coast of France near La Rochelle in the Atlantic Ocean and is a popular tourist destination with quaint places to stay.

Just like France's more famous southern coast, Isle of Rhe has fabulous beaches and great weather to lure tourists from all over Europe and the world. But unlike the southern coast, there is something truly unique about the waves that can be seen from many of its beaches.

To the naked eye, the waves appear to be square shaped, repeating over and over again to form a chessboard pattern on the surface of the ocean. The sight is so unusual that each year, residents and tourists alike, often flock to an old lighthouse on the shore to get a better view from its higher elevation.

What seems like the doings of aliens or an equally bizarre outer force, is actually easily explained by science.

Isle of Rhe lies at the intersection of two seas, often referred to as a cross sea. Miles under the surface of the ocean where the two meet, two different weather patterns can produce two wave systems traveling at opposing angles.

When these weather patterns last for longer periods of time, they produce these unusually large, square shapes that make for quite a sight!

While they might look beautiful, they also make the waters very dangerous. The strong currents formed due to a cross sea can be much stronger than any riptide we are familiar with.

In fact, it is not unusual to hear of ship accidents being caused as vessels get caught in these square waves. Thankfully, these square waves are not a constant phenomenon, making the beaches of Isle of Rhe mostly safe during all the other times.

http://www.lifeaspire.com/7342/the-cause-of-square-waves-in-the-ocean/

You're majesty, we've received a message from the castle: "Please inform the king that after what happened to the queen, the knights, the bishops, and all the pawns, there is NO WAY I'm moving off of King's Rook 1."

Typical... Trying to put a round light house in a square ocean.

I can't fathom an answer.

The light house operator's boss told him to get his area squared away,so he did.

NOOOO! Not B4!

You sunk my BATTLESHIP!