I was traveling to Banggai, Luwuk, Indonesia. And this beautiful water pool called "Luk Panenteng" is actually connect to open ocean (right behind the jumping rock). The rocky on island sides has water spring which people use to drink water, washing and bath, it is cold, but more farther, the water getting warm and salt. These kids loves to jump from this 4 meter rock cliff. No stairs to go up there but climb the root of tree there. I did my jump too, oh dear the water so cold.