From the entrance of Room B5 travel left to reach the shore, behind an enclosed puzzles. At the waterline is a submerged ruined structure featuring two long tops that are split down the center. Enter the water and go to the base of the ruins. Examine the underwater sand near the center of the ruined wall that is facing the exterior of the map to find a hidden key. After collecting it, return to the front of the ruins, and use the fallen pillar as a ramp to exit the water and get on top of the ruins. Search near the left corner to find a viewfinder. Look through the viewfinder and scroll slightly up from its original position to see the partially submerged Statue of Liberty in the sand.