However, you can do them in any order.

As you slide into the opening area, draw your Pistols and kill the two Vultures. There's also a Rattlesnake hiding in the bushes nearby.

Move forward, avoiding the quicksand on the left. Kill the next Rattlesnake and take the Rocket.

Move past the pool and go into the corridor. In here, push the block aside to reveal some Shotgun Shells.

Climb up the blocks and you will find a pit. Use a standing jump with a grab to reach the middle ledge and then use a running jump to reach the last ledge.

SECRET #1: When you get to the middle ledge, hang over the other side and shimmy to the right. You will drop into the pit without harm from the barbed wire. Kill the two Rattlesnakes and take the Small Medi-pack, Flares, and the Save Crystal. Kill the third Rattlesnake and push the block aside to get back out.

Climb up into the area and out in the open. Jump to the thin platform to the right (a jet will fly by) and follow it to the end.

Kill the Rattlesnake and jump to the next platform. At the end, jump onto the slope and slide backwards. Grab the edge on the way down and drop down to the ledge below. Follow it to the end for a Large Medi-pack.

Step up on the slightly higher part of the ledge and use a running jump with a grab to the left side of the rock formation. Climb up to the top and make your way across, killing the Rattlesnake, to the large metal structure.

Hop down the hole and swim through the tunnel. At the end, surface, and move forward into the canyon.

Turn right and take a running jump with a grab to the triangular ledge (Lara won't grab anything but the grab is necessary to prevent her from over shooting the jump).

Use a standing jump with a grab to the next ledge. Pull up and kill the Vulture, and then run and jump to the ledge ahead.

Follow it to the end and climb up to the top ledge. From here, turn around and use a running jump with a grab to reach the ledge with the Uzi Clips.

Return to the previous platform and use a running jump with a grab to the climbable wall.

SECRET #2: Climb down the wall until you see an opening. Let go of the wall and quickly grab it again just beneath the horizontal crack. Shimmy right and pull up into the opening, where you will find Desert Eagle Clips and MP5 Clips.

Dive into the water and search the canyon floor for two sets of Uzi Clips, Flares, and two boxes of Shotgun Shells. Make sure to check the niches below the waterfalls as well.

When you have the goods, climb out on the low red ledge. Climb up on the block and use a running jump with no grab to the ledge across the water.

Use a running jump to reach the next ledge. Get the Shotgun Shells from the left and then jump back up.

From here, use a running jump with a grab to the red ledge across the water and then climb back up to the canyon entrance.

Head back around to where secret 2 is. This time jump to the white ledge and climb up to the bush and kill the Rattlesnake.

Put Lara's left side up against the slope. Jump left to clear the slope and you will land on another. Slide down, grab the edge, and shimmy left. Pull up to the Save Crystal.

Take the Save Crystal and the Small Medi-pack next to the detonator box and then follow the wire down to some TNT. Just beyond that, you can grab some Flares in the green cave.

Leave the cave and return to the canyon. To the right, jump onto the slope and slide backwards. Grab the edge and climb down to the gap.

Let go of the wall and grab again to acquire the ledge. Follow it to another ladder next to the falls. Climb up to the top and back flip to reach the ledge behind you.

From here, use a standing jump with a grab to the block between the falls. Pull up, slide down, and jump to the ledge ahead.

Take the Small Medi-pack from atop the block and then use a standing jump with a grab to reach the crack in the wall. Shimmy right over the slope and drop down.

Back flip from the slope and you will land on another ledge. Use a series of running jumps across the ledges until you reach the left bank of a huge water wheel. If you ever fall in the water, you will be swept back over the falls and forced to backtrack a great distance.

SECRET #3: After reaching the left bank, go towards the left corner and crawl under the rock. Climb up the ladder and dispatch the Rattlesnake. Take the Uzis and leave the way you came.

To the left is a large rock formation with a Rattlesnake behind it. Go behind the water wheel and kill the thug.

Continue on and climb up the ladder on the side of the structure. At the top, turn right and follow the path out in the open. Kill the two Vultures and move over the yellow blocks to the bushes beyond.

Take out the Rattlesnake and take the Grenades. To the left of the yellow blocks, dive into the water and pull the lever. This opens a door behind you and lets you access to some Desert Eagle Clips.

Take the Desert Eagle Clips and swim back beneath the yellow blocks. When you see two large yellow ramps, swim past them and go to the corner near the rocks. Pull the lever and swim down the door between the yellow ramps.

As you get in, swim up and pull the lever. Continue down the tunnel, pulling the next lever on the side as you go upwards. Surface in the hallway and follow it to the end. Throw the switch to call up the elevator and divert the river to the water wheel.

Slide down the slope to return to the area with the yellow ledges. Climb out of the water, killing the Rattlesnake to the right, and go forward past the ledges to the now dry area. Drop into it and move forward to the stream.