Introduction to Grandmother and Grandfather Rocks: Grandmother and Grandfather Rocks (HinYai/HinTa), located south of Lamai Beach, consists of two strange rocks whose shapes are similar to the reproductive organs of men and women. The Grandfather Stone stands straight on the rock, while the Grandmother Stone is more than a hundred meters away, hidden in the rough sea, and can only be clearly seen at low tide. In addition, it is also a popular place for sunbathing tourists.