On Earth there is a closed off vault door against the shoreline by The Grottos, every DLC I run to check it, but it never ends up being added. I ran there a few hours ago to check it for The Taken King DLC, and FINALLY the area is textured and finished, and my god I LOVE what they've done with it! The video attached shows me breaching into the inaccessible area The Mine and having a look around, do have a look, and if you want to feature the footage or use your own on any forums or videos, credit would be 'greatly' appreciated, but unnecessary :) - Camico