The Greenbrier Bunker, also 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 during the Cold War era, this underground bunker was designed to house and protect the entire United States Congress in the event of a nuclear attack. The facility remained classified and operational from the early 1960s until 1992, when its existence was revealed by The Washington Post, leading to its decommissioning.
Today, the Greenbrier Bunker serves as a historical tourist attraction, offering visitors a glimpse into Cold War-era civil defense preparations and the lengths the U.S. government went to ensure governmental continuity during the nuclear threat of the 20th century.