12 Unique Underwater Wonders in Oceania for the American Diver

6. Poor Knights Islands, New Zealand

The Poor Knights Islands rank among New Zealand’s natural wonders above and below the waterline. Jacques Cousteau once named these volcanic islets one of the world’s top dive locations, and it’s easy to see why. Subtropical currents feed forests of kelp, archways, caves, and stunning drop-offs, where rays, moray eels, vibrant sponges, and—seasonally—even visiting orcas may appear. Entrances to underwater arches allow divers to play with light and shadow, making every dive feel different. Access is straightforward from the town of Tutukaka, and dive operators cater to a range of skill levels. In summer, waters warm up just enough for comfortable three-mil wetsuit dives. The mix of rugged volcanic geology and lush marine life offers a memorable New Zealand experience not often found elsewhere in Oceania.