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 in the late 1950s, this underground bunker was designed to house and protect the entire United States Congress in the event of a nuclear attack. The facility remained operational for over three decades as a classified government project, with its existence unknown to the public and even to most resort staff.
The bunker featured reinforced concrete walls, air filtration systems, and dormitories capable of accommodating over 1,100 people. It included a large auditorium, meeting rooms, and communications equipment to maintain government operations during a national emergency. The facility was maintained by a small team of government employees who worked undercover as television repair technicians at the resort. In 1992, the existence of the bunker was revealed by The Washington Post, leading to its decommissioning and subsequent transformation into a tourist attraction and historical site.