The J4 Submarine is a WWI wreck in the Victorian Ships’ Graveyard, lying north–south on a rocky seabed. Divers can enter through several hatches, though the shallow depth makes it prone to strong surge. When conditions are right, the clear, silt-free interior offers one of Melbourne’s best dives.

The Coogee shipwreck lies about 4 km offshore between Point Lonsdale and Barwon Heads on a flat limestone and sand seabed. Facing north toward shore, the bow rests at 33 m and the stern at 35 m. The bow and stern remain intact, while much of the midships section is flattened or missing.

Castle Rock is located outside the Port Phillip Heads in approximately 18 metres of water. It sits on a sandy bottom and rises to around 12 metres. The rock is around 200m in circumference, has many overhangs, walls and swimthroughs, and can be circled several times in a dive.

Discovered and named by one of the great local diving legends, this dive site is spectacular. Approximately 1 kilometer from the Point Lonsdale Light and clear of the shipping channel, just outside Port Phillip Heads, is an amazing area of bommies, or underwater rock formations.

Foggy Reef sits at the southern-most end of the Lonsdale wall system. The top of the wall is a great dive for beginners as it is around 8 meters deep. If you swim northeast you will find the edge of the wall. This site is part of the Port Phillip Heads Marine National Park.

Devil’s Drop Off is one of the Melbourne’s most popular dive sites onits famous Lonsdale Wall. Devil’s Drop Off begins with a large drop-off from around 12 to 30 metres and continues with many ledges, overhangs and swim throughs.

Lonsdale Wall is the remains of an ancient Yarra River gorge formed when sea levels were lower during the ice age. Now flooded between Point Lonsdale and Point Nepean, the one kilometre wall offers divers overhangs, canyons and ledges filled with diverse fish and invertebrate life.

Rip Bank is an impressive underwater cliff just outside the south-east side of Port Phillip Heads. This site should only be dived at slack water at the end of the flood tide, and only in calm conditions, as the current travels along the wall and can become extremely fast.

Situated in the famous Sponge Gardens, Boarfish Reef lies approximately halfway between Queenscliff and Point Lonsdale. It starts in approximately 10 metres of water and gradually increases in depth to around 22 metres in a system of interesting rock formations and overhangs and swim-throughs.

The Grotto is named after the many small caves and large overhangs that form this site. Located on top of the Lonsdale Wall system, this area is teeming with marine life and a photographers dream. This site gradually increases in depth to around 23 metres in a system of interesting rock formations and overhangs.