Introduction to the Navel of the World: There is a small circular pool made of pebbles near Ahu. There is an extremely smooth round pebble about one meter in diameter in the middle of the pool. The pebbles are surrounded by southeast, northwest and northwest. Four pebbles. It's called Te Pito o te Henua, which means "the navel of the world." Visitors like to put their hands on the boulders to feel the positive energy.