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.

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.

This is a dive in the middle of the Port Phillip Heads Marine National Park. The plateau is a huge rocky platform in around the 16-meter range winding its way around the edge of the platform. This is the deepest water in Victoria, originally part of the river Yarra.

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.

Constructed in Glasgow Scotland in 1874 for Samuel Ramsden of Melbourne and named after his wife, this ship cost 10,000 pounds. She was a three-masted iron barque 151 ft long and 27 ft wide with a gross tonnage of 415 tons. The vessel sunk in 1875 on her first voyage out of Melbourne when she struck Corsair rock.