the right. Turn right and follow the path back to the steps. Now follow the instructions at the beginning of the walkthrough to get from the CHECKPOINT 3 (now 28) to where the SECOND COG was. If you destroyed the wooden bridge earlier, just grapple-swing across to the ledge. (You can also obtain the SHOTGUN if you missed it earlier . The walkthrough above describes how.) There's another CHECKPOINT on the ledge where you got the SECOND COG. From there, continue to the switch, as described. Use it to raise the bars blocking the underwater tunnel. Then drop into the water, head downstream to the tunnel and get the relic. This gameplay video shows how to reach the switch, if you missed it on the first pass, and then obtain the relic. After obtaining the relic, swim back out to the stream. Surface and head downstream to the sluice gate. Climb out of the water on the right, roll under the log and then jump or swan dive into the pool below. Climb out on the steps between the waterfalls and follow the passage to the end of the level. * ABOUT ARTIFACTS, RELICS & RUBBING REWARDS: Finding artifacts and relics (formerly known as "secrets") unlocks various extras like outfits and concept art. The Nintendo Wii game also includes "rubbing rewards" in some levels. I have numbered each of these bonuses in the walkthrough. So, for example, "Artifact #2 (10/44)" means that this is the second artifact in this particular