The Greek-registered Idannis K was a former US Liberty ship, which ran aground on Back Beach, Vung Tau in 1967. Although the USN was prepared to re-float the vessel, the owners decided against it. Not long after, a mysterious fire ravaged the ship.
By 1969, the rusting hulk was being used as a diving platform. One entered by climbing the bow anchor chain, skirted the many holes from the fire in the deck, and dived off the stern when the tide was in.
Image courtesy Noel Benefield