Located 30 meters off Milln Reef near Cairns, the Large Bommie is a notable dive site. Milln Reef itself rises to the surface, featuring a shallow wall that descends to an 8-meter sandy bottom. From there, a gentle sandy slope leads to the Whale Bommie, which begins at 12 meters at its base and extends to a depth of 24 meters. The top of the bommie is submerged 2 meters underwater, adorned with various coral plateaus. This site is popular for sightings of large pelagic marine life. During night dives, divers can observe Bumphead Parrotfish congregating, with turtles often found sleeping in the nooks and crannies.
