SS Yongala Wreck is a protected offshore wreck dive south of Townsville where a fully marine-encrusted ship sits in open blue water and functions as one of Australia's signature big-animal dive sites. The wreck is the structure, but the real draw is the living reef around it: dense fish biomass, rays, sharks, and the feeling of descending onto a historic vessel that must be treated with the discipline of both a heritage site and an exposed advanced dive.