Most Monoliths have two or three learning stones attached and the Monolith itself holds a piece of the story of one of the three races or a little puzzle for getting some rewards and some Atlas words.
But every now and then I come across one of these huge slates which apparently have no way to interact with it.
There are no learning stones nor can you interact with the monolith or any of its features.
You can fly on top of it with your jetpack but there is nothing to see.
You can walk inside the hole in the middle and it appears like this is handled like a building. Like in any real building you're not able to fire your weapons while standing in the tunnel.
In the middle of the tunnel is a white marker which also is visible on the "radar" at the top of the screen.
While trying to figure out what that thing is and what you can do with it, a sentinel came by and flew right though the hole. I shot it down and the barrel it dropped felt right though the floor and was gone. Same thing happened with more sentinels killed outside on the front court of that thing.
What is it and what can you do with it?