Queensland State Archives posted a photo:
Fort Lytton began closing down as soon as the Second World War ended. However, the signal station remained operational until late 1965. The fort’s last significant defence operation was in October 1964 when the signals station was used to gather intelligence on the “Indonesian coup”. Shortly after this incident, the Fort Lytton site was handed over to the AMPOL oil company to build an oil refinery.
Whilst most of the site was transformed into oil refining and storage facilities, three parcels of land were left intact. They were the site of the colonial fort and its associated structures, Lytton Hill and its associated structures, and the site of the heavy anti-aircraft battery, containing four protected guns pits and a command post. The oil company transferred the site of the colonial fort and its associated structure to the Queensland Government in 1988, and this became Fort