At Waitabu Marine Park & Campground you can swim and snorkel over a fringing reef that has been a marine-protected area (MPA) since 1998, when the Waitabu people and other villages agreed to stop over-fishing. There are guided snorkeling tours using bilibili or traditional bamboo rafts followed by tea and music on the beach. A cheaper option does not include rafts or tea. The campground offers 12 tent sites near the water's edge, and communal cooking and bathroom facilities.
It's slightly north of Vidawa village on the coast.