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. Constructed in the early 1960s during the Cold War, this underground facility was designed to house and protect the United States Congress in the event of a nuclear attack. The bunker remained classified and operational for over thirty years until its existence was revealed by The Washington Post in 1992, after which it was decommissioned.
The facility featured reinforced concrete construction, dormitories, a hospital, a power plant, and communications equipment to support members of Congress for up to 60 days in isolation. Its location beneath a luxury resort allowed it to maintain secrecy while being readily accessible to government officials traveling to Washington, D.C. Today, the Greenbrier Bunker serves as a historical tourist attraction, offering guided tours that showcase Cold War-era civil defense preparations and the unique intersection of civilian hospitality and military contingency planning.