This is not really a nature-tourist attraction. As this unnatural bright blue lake was formed due to Kaolin mining. Kaolin is a fine white clay normally used to making pottery. They dig the kaolin from several spot in one point of the island and later on it formed a wide open white bottomed ditch,which then when the rain fall, it is all gathered here and the white bottom made the water color become striking blue. "http://www.travbuddy.com/Kaolin-Lake-v382388"