The Greenbrier Bunker, also known as Project Greek Island, was a secret United States government continuity program located beneath the Greenbrier resort in White Sulphur Springs, West Virginia. Constructed in the 1950s during the Cold War era, this underground facility was designed to house and protect the entire United States Congress in the event of a nuclear attack. The bunker remained operational for over three decades, maintained in a constant state of readiness by a small team of government employees who worked undercover as resort staff.
The facility was decommissioned in 1992 after its existence was revealed by The Washington Post, ending its classified status and Cold War mission.