Strange Cave Near ??? Meteor

There is a cave north of the ??? meteor that has 3 pressure plates takes 3 players to open. It was here BEFORE the last update, and contained the same thing as it does now; a few ruins.

Contents before update (This was when I was in a group searching for the previous ???.)
Contents after the update:
It seems kind of useless right now, but I think it's worth noting.
Not everything strange is related to ???

 

Bump, and add this to the ??? Section