Diver Finds Structure on Ocean Floor — Then Finds Out Why It’s There

His next move

There appeared to be no sign of collapse around the outer surface and the entrance way, which gave Eli confidence in his next move. During this analysis, he was already hyping himself up to go inside. Underwater photos of coral and fish had to wait; this was far more interesting than anything he could hope for. But nobody could have prepared him for what he found inside.