160 years ago, a ship caught fire and ran aground off Australia; now, mangroves have turned it into a living island filled with greenery and wildlife | World News

Built in Glasgow in the 1860s, the City of Adelaide began life as an iron-hulled passenger and mail steamer before undergoing several transformations that eventually left it stranded off Magnetic Island in Queensland. After becoming a coal-storage hulk, the vessel was badly damaged by fire in 1912 and later bought with plans to give it another purpose as a breakwater or tourist accommodation. Instead, it ran aground at Cockle Bay in 1916 and remained there. More than a century later, the rusting remains have become intertwined with mangroves growing around and through the wreck. The ship’s transformation from working passenger vessel to vegetation-covered wreck has made it a distinctive part of Magnetic Island’s maritime and natural landscape.

The ship that caught fire and ran aground off Australia

The City of Adelaide was launched in 1863 and completed in 1864 by J&G Thomson in Glasgow, Scotland. The iron-hulled vessel was built for passenger and cargo services and operated between Australian ports, including Melbourne and Sydney. It later served as a mail steamer on routes that extended to New Zealand, Honolulu and San Francisco. In 1890, its steam machinery was removed and the vessel was converted into a four-masted sailing ship. By 1902, it had become a coal-storage hulk at Townsville. Its working life changed dramatically again in 1912, when its coal cargo caught fire and the vessel was badly damaged.

A burned-out vessel was meant to become a breakwater

After the fire, the damaged vessel was bought by George Butler, a Magnetic Island businessman, in 1915. Butler had plans for the old ship that would have given it a very different final chapter. Proposals included using it as tourist accommodation or incorporating it into a breakwater and jetty at Picnic Bay. The plan, however, never reached its intended destination. While the vessel was being towed towards Magnetic Island, it ran aground at Cockle Bay in 1916. The ship was never refloated and remained in the shallow coastal waters, where its exposed hull gradually deteriorated.

The wreck became part of Magnetic Island life

The abandoned vessel eventually became more than a maritime relic. ABC reported that by the 1920s, people were visiting the wreck, with swimmers reportedly using it as a changing room and collecting oysters that grew around the structure. The City of Adelaide also acquired a wartime connection. In 1942, a Royal Australian Air Force aircraft struck one of the wreck’s masts during a training exercise, killing four people aboard the aircraft. Decades later, Cyclone Althea in 1971 caused further damage to the already deteriorating wreck. These events left the remains in increasingly fragmented condition, but substantial sections of the historic iron vessel continued to survive in Cockle Bay.

Mangroves have grown through the century-old wreck

Over the decades, the coastal environment has increasingly become part of the wreck itself. Mangroves now grow around and through sections of the rusting iron structure, giving the remains an unusual appearance from the air and making the wreck resemble a small vegetated island. The Great Barrier Reef Marine Park Authority identifies the City of Adelaide as one of the historic wrecks around Magnetic Island and notes the ecological role that shipwrecks can play by providing surfaces and structure for marine organisms. ABC has also reported that expanding mangrove growth around Cockle Bay has made the wreck increasingly difficult to see from land. The result is a striking combination of maritime history and coastal vegetation, rather than a conventional shipwreck sitting alone in open water.

The 160-year-old wreck is now part of a coastal ecosystem

The City of Adelaide lies about 300 metres offshore at Cockle Bay in relatively shallow water and can be approached by wading at low tide under suitable conditions. Its mangrove-covered remains now form part of the coastal environment, where vegetation and marine organisms occupy the structure. However, describing it as a literal natural island can be misleading: it remains a shipwreck, with mangroves growing on and around its surviving sections. The Great Barrier Reef Marine Park Authority treats historic wrecks as maritime heritage and advises visitors not to remove, disturb or interfere with artefacts. More than a century after the City of Adelaide ran aground, its rusting remains have therefore taken on a new role, with nature gradually reshaping a once-working ship into a distinctive green landmark in Queensland’s coastal landscape.