Talk to Nai (A).
Take the MAP (B).
Place the MAYAN ARTIFACT in the stone (C); take the SAW EMBLEM and the 1st STONE HEAD (D). Take the MAYAN ARTIFACT again.
Select the fountain (E).
Play the HOP to earn the 2nd CLIMBING CLAW (F).
Pull the branches back on the left and right (G).
Take the BOW (H).
Walk down twice and enter the ship.