We went to Nelson Bay specifically for what hides beneath the surface at Broughton Island. The island is a 40 minute boat ride from the main land and offers many exciting dive sites where you share the water with grey nurse sharks, wobbegong sharks, big shoals of fish and the odd turtle. We went with Feet First Dive and had a great experience with them!
The Looking Glass is a particularly exciting dive sites; a rock formation split in half. It’s kind of like a drift dive, except you go both forwards and backwards, for the duration of the dive. As long as you’re aware of your surrounding, it’s a really cool dive. I would recommend gloves and a pointy stick which will help avoid any uncomfortable encounters with the rocks.