Limestone Hideout - How do I Unlock?

I really do wish this game was more informative on how to do the content.

You either rely on banging your head against a wall trying to figure it out and being penalized over and over or you Google it.

Can someone please tell me how I unlock the Limestone hideout? I tried Googling it but zero results.

Thank you.

On the atlas . You path towards it when you see one and put waystone in it, complete it and unlock hideout

Thank you. So I have to see it in the mapping system then I complete the map to acquire it?

The node is literally called 'Limestone Hideout'?