Kayaking or swimming the Blue Holes on the east coast of Santo island in Vanuatu is like discovering a piece of paradise. They Must be discovered with a kayak and avoid a dinghy with its outboard engine. It is a pity to see motor boats in that kind of place doing noise pollution, leaving oil and benzine in such cristalline waters. I don't really understand how that kind of practice is authorized. People of leisure sailing and motor yachts would be advised to show them respectful with these unspoiled and gorgeous places by not using the outboard engines of their tenders when visiting blue holes.