The underwater structure off the coast of Japan — natural or engineered?

The underwater structure off the coast of Japan — natural or engineered?

In the shallows off Yonaguni, Japan’s westernmost island, the sea floor drops away into shadows. A few meters down, the reef opens to reveal something vast. It doesn’t resemble a coral shelf or a sloping rock bed. Instead, divers encounter massive ledges, flat platforms, and vertical faces that look like walls. Underwater light filters across […] The post The underwater structure off the coast of Japan — natural or engineered? appeared first on …