This is an
underwater structure built about 80 feet underwater off the coast of the southern Japanese island of Anami Oshima. Considering no one had ever encountered anything like it, diver and underwater photographer
Yoji Ookata was at a loss to explain what had built the circular, repeating, and clearly geometric structure. The architects of this feat of underwater engineering were discovered by Japanese broadcaster
NHK, and the answer to what built the
six and a half foot wide structure is at once mundane and really impressive.
Read on...
