https://www.gamespot.com/articles/fallout-76-features-the-us-governments-secret-bunk/1100-6462348/

Fallout 76 will feature Project Greek Island, the secret United States government bunker built underneath the Greenbier Resort located in West Virginia among the Blue Ridge Mountains. This is according to Xbox's Larry "Major Nelson" Hyrb, who was among those who attended a recent preview session of Fallout 76 at the Greenbrier Resort. Hyrb spoke briefly about the inclusion of Project Greek Island in Fallout 76 during the latest episode of his podcast.

He said it will be featured in the game in some capacity, but he did not share any further details. Whatever the case, the inclusion of the Greenbrier Resort and Project Greek Island makes a lot of sense for Fallout 76 given its subject matter.