9 bizzare underwater discoveries that will make you shiver to the marrow (See Photos)

6. A Japanese MonumentYonaguni Monument has been sitting on the ocean floor a few miles off the coast of Japan for over 5000 years now. Some people believe it to be a natural phenomenon, while others think it’s a man-made artifact. I personally don’t see how this thing is anything but man-made, but hey, it’s just me.