The Vault of Trophies - Flooded Tunnels to the Next Level
Retrieving the LAST OBSCURA PAINTING, as shown in the previous section, extinguishes the fire in the fireplace, so you can crawl through.
Proceed through the next door...
...into a small room with a pool. Jump in and swim down. (If you like, you can equip an AQUA-LUNG or RESPIRATOR first, but this isn't necessary.)
Follow the underwater passage down and around to the left.
Just beyond the first set of wooden support beams...
...there's a four-way intersection, but rubble blocks both side passages. So continue straight ahead through two more wooden support arches to a T-intersection.
Turn right here. Just ahead, rising bubbles indicate an air pocket in the ceiling. Swim up and fill Lara's lungs.
Then dive to the bottom and continue straight ahead along the tunnel...
...as it narrows and corkscrews around to the right...
...then left.
Just before the next intersection, more bubbles indicate another air pocket above. (You don't have much farther to go, but if you like, you can swim to the top of the long, vertical shaft to breathe. Then swim back down to the intersection.) Continue to the right. (Straight and left are dead ends.)
Follow the tunnel a bit farther. Then surface in a large, round room to trigger a cutscene.
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