I searched around a bit but I have been unable to find any information on that little cave below the stone walkway in Pharynx. Its just below the walkable stone ledge from the right of the entrance. I jumped down to it and it leads to another separate chamber that appears to be some sort of graveyard. I wandered around for a bit but couldn't find a single thing to do, couldn't even draw glyphs.

So I was wondering if anyone knows what this could possibly be for.

It's one of the numerous easter eggs in the game. It's a location from Pathologic, I think?

i thought it's a playground=P