Pukao

Pukao are the hat-like structures or topknots formerly placed on top of some moai statues on Easter Island.

[2] Pukao are cylindrical in shape, with a dent on the underside to fit on the head of the moai and a boss or knot on top.

[7] The rocks were sourced from a quarry known as Puna Pau, which was located inside the crater of a volcano with the same name, and on its outer lip.

After the Pukao were made, they were rolled by hand or on tree logs along an ancient road to the site of the statues.

Meanwhile, more intricate carvings were made at the site of the moai, immediately prior to the placement of pukao on the statues.