Angel Island Immigration Station was a self-contained facility on 13 acres modeled after the Ellis Island Immigration Station in New York Harbor. Its hub of operations was the Administration Building, which housed intake and interrogation facilities, staff offices, a records vault, dormitories, and dining rooms. Flanking it on the hillsides were the Detention Barracks, Hospital, Central Heating Plant, and employee cottages. When the Administration Building burned in 1940, the station closed and operations moved to San Francisco. The model shows the immigration station as it was from 1912 to the early 1930s, and additional buildings were built in the 1940s when the station became a World War II POW camp.