Yeah, Greek is right, and it is everywhere. That is why I so adamant about checking your location so thoroughly, and also, while working the Institute, I told you make sure your map marker was in an "empty" Wilderness cell. Be extra careful of built in "workshop" locations, they can be awful to deal with. RRS has two of them. Also, like Greek had, those map markers with the GIANT yellow circles often need to be shrunk down, I've avoided doing that to Lexington, but I think it's finally going to happen. Sometimes they are a mile in the sky, other times under the ground or inside a building. The marker for Mass Fusion Containment LOCATION is also under the North End Church Graveyard in vanilla... I suppose then, Geno, when your Disposal site comes out, you'll have to mention you were forced to fix Mass Gravel and Sand to make it work.