Yes about a mile underwater off Cuba there exists sphinxes, pyramids, a stonehenge, with a written language engraved on the stones. Some of the symbols are found on objects in Cuba.
They apparently shut down the site and took control to keep it out of the hands of Russia. According to the article they are still recovering objects. Chances are, you won’t hear much about it.
Cuba hasn’t been underwater in at least 10,000 years.
This stacks up well with an older post concerning these same pyramids.