Here you will find yourself having to climb a massive tower with saw blades around it. Climb up twice and once right, then left once again. Climb up over the edge and as you stand on the corner, two pots will come into clear view.
The one on the right holds an emerald and the one on the left holds another piece of the Twin Snakes. Continue over to the next wall.
Before climbing up the next wall, you can see another pot to the right side of the tower. Break it for an emerald. As you are about to climb, you may notice the saw blade will hit you. So climb up, drop down, climb up, then drop down one last time. With the saw blade out of the way, head left and continue upward towards the next saw blade. Move up once, right once, left once, and climb the edge.
The next section of the wall has a brown lever. Drop down to the edge of that wall, head down twice and left once. Flip the lever to raise the brown platform. After this head on up to pull the big lever for the bridge. You will automatically drop down to the next section.