The Monument

The Monument sits on the southern Kurnell headland inside Kamay Botany Bay National Park, adjacent to the Whale Sculpture and Commemoration Flat, and offers a genuinely beginner-friendly introduction to national park diving. A rocky wall drops to 13 m through boulders blanketed in sponges, soft corals, and tunicates — the dense invertebrate growth that accumulates over decades of protection — with sandy patches between the reef sections providing contrast and resting grounds for stingrays. Nudibranchs are the macro highlight, appearing in remarkable diversity along the wall and boulder zones throughout the year. Weedy Sea Dragons are also recorded here, though sightings are less predictable than at The Steps further south along the headland.

Entry is via a natural channel between rocks which keeps the approach manageable and makes this one of the more forgiving entries in the national park. The site dives well in most conditions short of severe weather and is sheltered from southerly winds. Current becomes moderate during tidal changes but settles at slack — time your dive for an incoming tide or just before high water to get the best combination of clarity and manageable flow. Visibility averages around 6 m. The site has high sediment sensitivity, so buoyancy discipline is important — silt disturbed by careless technique accumulates readily and takes time to settle. Allow at least a week after heavy rain before visiting; with a runoff sensitivity of 4/5, water quality degrades significantly after rainfall and recovery is slow.

Boat traffic is the primary ongoing hazard in this stretch of Botany Bay. A large dive float with flag is essential for any surface swimming, and deploying your DSMB before ascending is non-negotiable at all times. The surface swim back to the entry channel can be longer than expected if the current has moved you during the dive — plan your gas conservatively to account for it and turn back earlier rather than later.

The Monument is also worth approaching as a photographic destination in its own right. The wall face and the kelp canopy above it create a layered composition that wide-angle shooters use effectively, while the boulder base and the crevice sections between the larger formations reward macro photographers who take time to search the encrusting growth carefully. Nudibranchs appear consistently through the cooler months. The high sediment sensitivity at 4/5 means that a diver who disturbs the bottom significantly will impact both their own photographs and the experience of everyone else on the dive — slow, precise movement is a practical requirement here as much as a courtesy.

A National Park day fee of $8 per vehicle applies. Commemoration Flat has picnic tables, BBQs, toilets, drinking water, and a cold shower — one of the better-equipped spots in the park. Abyss Scuba Diving is 18.3 km (21 min).