Located beneath the Treasury building in the Whitehall area of Westminster is the Churchill War Rooms. Previously called the Cabinet War Rooms, this where leading government ministers, military strategists, Prime Minister Winston Churchill and a dedicated staff of 500 people conducted war operations during WW II.From this network of underground rooms, you’ll see how they lived, where they strategized and survived unimaginable attacks by Hitler’s Nazi Germany. When World War II ended, the staff simply walked away leaving everything just as it had been, which included maps, phone banks, typewriters, signs that said ‘No whistling inside,’ and sun lamps for staffers who never saw daylight for months.