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, this underground bunker was designed to house and protect members of Congress in the event of a nuclear attack. The facility remained operational from the 1960s until 1992, when its existence was publicly revealed by The Washington Post, leading to its decommissioning.
Today, the bunker serves as a historical attraction, offering tours that showcase its role in Cold War military preparedness and civil defense planning.