Enter the ancient ruins, and explore the crumbling structures. Collect:

Place the star map on the central table and press the light-filled buttons to reveal stairs. Item/Puzzle Action/Solution Lighter Found in a box after solving the wall light puzzle. Boiler

Go to the bench and solve the by adjusting mirrors until the beam hits the target to unlock a key .

: Adjust mirrors on the bench so the light hits the target. Once the key is unlocked, take it to the door. Hexagon Door