Exit the fenced area and turn right. Go around to the left and towards the trailer. A guard opens the door and exits from there. Shoot him and get the K2 Impactor Gun he drops (Clip if you have it). Enter the trailer and use the switch to turn on the power.

The brief cut scene shows what happens by turning on the power: the lights and a Control Panel in an area you have not been yet turn on, a mechanical switch that will give you access to the puzzle of the level also turns on and the ventilation system is activated.

Exit the trailer and turn right. A second guard emerges from the tent. Kill him and get the M-V9 Gun he drops (Clip instead).

Room with big scanner - Open the big blue doors on the right of the tent to enter the area you saw by using the switch before. Approach the Control Panel and use the levers to scan the sandy area ahead. Press Action to use the levers. Press the direction keys to move the scanner at the top left. Once you locate the Symbol, press Crouch to get back Lara's control and make sure you collect the First Ancient Symbol Copy from the printer on the left.

Exit the room and turn right. Open the door of the trailer next to the tent and get the Second Ancient Symbol Tracing from the printer. There is a terminal on the left desk from where you can get some info about the Nephilim Race.

The Nephilim were the hybrid offspring of angels and humans. They were thoughts to be able to change their physical appearance and flourished in Turkey in early biblical times.

Going down - Exit the trailer and kill the guard that appears on the left hand side. Continue to the right around the fenced diggings and use the ladder at the break fence. Climb down the ladder and turn right. Follow the scaffolding to the end and climb down the next ladder. Go behind the next short ladder and jump to the opposite scaffolding. Climb down the next long ladder and kill the guard that is on the ground.

Going up - Vault over the railing, which is next to the ladder you just climbed down. There is nothing interesting on the ground, so start climbing up the wall on the right hand side. If you need it, refresh your strength by landing on the first small ledge. Keep climbing up until you reach the top stone ledge. Monkey swing across, using the arched rock above. Make sure you do not stop at all, because Lara has just enough strength to make it.

(Note - You can take a shortcut and avoid going all down and then up again. When you climb down the first short ladder at the break fence, approach the next ladder and take a look at the stone ledge that the arched rock leads you. You can take a running jump over the railing and land directly on the stone ledge. You may want to save your game in case you do not make it in the first time. See this screenshot to get oriented.)

Climb on the wooden platform and vault onto the bridge. Go to the right and turn left at the middle of the bridge. Use the switch to lower an elevator. The circular trapdoor is the level exit, but you need to solve a puzzle first. Go back to the wooden platform and drop down to the stone ledge. You now have to jump on the elevator. You can either perform a running jump or side-flip. If you take a standing jump, Lara will grab the arched rock above.

The Puzzle - Stand in front of the moving wheel to stop it. You can see many symbols but you need to use and lock only four of them. Two symbols that Werner wrote down are in your Notebook (check the last page). The other two are the ones you found before. The Notebook also shows the correct order to lock them. The Notebook on the last page says: Half Moon, Stick Figure (the First Ancient Symbol Copy), Bull's Eye (the Second Ancient Symbol Tracing), Scorpion (as shown here). There are four levers around the corner to the right (as you face the wheel) and each one locks a symbol on the wheel.

To turn the wheel, use the crank. Turn the wheel until you get the Half Moon in the leftmost bracket. It is better if you do it in order. Go around and use the first lever from the left to lock the Symbol. Turn the wheel again until you get the Stick Figure (First Ancient Symbol Copy) in the next bracket and use the second lever from the left to lock it. Again, turn the wheel to get the Bulls' Eye (Second Ancient Symbol Tracing) in the third bracket and use the third lever. Finally, get the Scorpion on the last bracket. If you make it correctly, you will not need to pull the last lever (if you cannot understand the above description, see this screenshot).

The brief cut scene shows you the circular trapdoor above opening.

Jump to the stone ledge and climb onto the wooden platform. Vault on the stone bridge and drop through the trapdoor to end the level.

(Note - You are coming back to this level after completing The Hall Of Seasons. For this brief visit, check the walkthrough at the end of Hall Of Seasons.)