We find new unknown settlements and civilizations pretty frequently so there’s not really any reason to believe they’re hiding anything here. Some squared off rocks doesn’t mean it’s definitely man made.

It should be pretty easy to find some sort of pottery or some remnants of something from humans in the area and the fact that they haven’t found anything in the almost 40 years since it was discovered makes me skeptical that there’s any to find.

It’s still possible they might find something in the future, you never know