The Lacuna is a collapsed sea cave located in the Subantarctic Islands of New Zealand. This advanced dive site features a distinct topography defined by moss stalactites hanging from the cave rim and extensive kelp beds situated below. Access to the site is strictly by boat. Divers should be prepared for strong currents and the challenges of an overhead environment. The water temperature ranges between 9C and 11C throughout the year. Due to the presence of surf, boat traffic, and entanglement risks, this site is intended for experienced divers. Snorkelling is also possible at this location.

Sandy Bay in the Auckland Islands is a sheltered bay characterised by golden sands and extensive kelp forests. This site serves as a primary landing area and offers a marine environment suitable for intermediate divers. Access is via the shore, though conditions can include surf, strong currents, and entanglement hazards. Water temperatures typically range between 9°C and 11°C, though summer temperatures may reach 16°C. The site is also well-regarded for snorkelling, with a rating of 4/5. Divers and snorkellers should be aware of the presence of sharks in the area.