The Greenbrier Bunker, officially known as Project Greek Island, was a secret United States government continuity facility located beneath the Greenbrier resort in White Sulphur Springs, West Virginia. Built during the Cold War era between 1958 and 1962, this underground facility was designed to house and protect the United States Congress in the event of a nuclear attack. The bunker remained operational for over thirty years, maintained by a small team of government employees who worked undercover as television technicians at the resort.
The facility was constructed beneath the West Virginia wing of the Greenbrier hotel, featuring reinforced concrete walls and blast doors capable of withstanding nuclear explosions. The bunker included dormitories, a hospital, a power plant, and a communications center, all designed to support Congress members and their staff for up to sixty days in isolation. The existence of this secret facility was revealed by The Washington Post in 1992, leading to its decommissioning and subsequent transformation into a tourist attraction and historical site.