Examine the two statues guarding the door. Use the Stone Disc on the empty slot of the left statue.
Draw the symbols from the Solar Bridge area so you don't have to keep walking back and forth. solution hidden escape lost temple chapter 6 best
Use the Empty Bucket on the pool to get a Bucket of Water . Pour the water into the funnel on the left wall to raise a hidden pedestal. Examine the two statues guarding the door