The bunker was located about 200 feet below the sign and was constructed using reinforced concrete. It was equipped with emergency supplies, such as food, water, and medical kits, and could hold up to 50 people. The bunker also had a radio and a telephone, so that its occupants could stay in contact with the outside world.
The Hollywood sign was chosen as the location for the bunker because it was one of the most visible landmarks in Los Angeles. It was thought that the bunker could serve as a symbol of hope and resilience in the event of an air raid.
The bunker was officially decommissioned in 1945 after the end of World War II. However, it remains intact and can still be visited today. Tours of the bunker are offered by the Hollywood Historical Society.