In this blog post:
billionaire Jeff Bezos claims he has found the remains of the Apollo 11 first stage. I wonder, though, if it is even possible to know that what they found is the Apollo 11 first stage, and not the first stage of one of the other moon flights. According to this wikipedia page:
several other Saturn V first stages are located within a few minutes of arc (i.e., a few nautical miles) of the Apollo 11 one in the Atlantic. Is there some easy way to distinguish Apollo 11 from the others?