When you start, go straight ahead and grab the two Red Orb Chests and Gorgon Eye from the end of the walkway. Go back and drop down to the floor below to fight some hounds and a Satyr General. Once they're dead, go into the hallway that is shown, restoring the Decayed Chest (Chest #2) before moving on.
Take the first right and then go left to find another Decayed Chest (Chest #3), as well as the Mystery Painting on the right side. Go back and continue through past the Blue/Green Chests. Once you're outside, you'll be attacked by a Cyclops, as well as some bugs. After the fight is over, go to the right of where the Cyclops came from to find another Decayed Chest (Chest #4), then drop down by the broken bridge, going all the way to the right for another Decayed Chest (Chest #5). There's also two Red Orb Chests in the small room down there.
Jump back up and heal the bridge with your Amulet, then continue along the path, inching your way past the waterfall. Keep going down and jump across the gap to end up back at the water wheel. Here, you need to jump down and use the Amulet to heal the wheel a little bit, so that the pillar by where the pullable chain is located is suspended in mid-air.
With that done, grapple the chain and walk back all the way, then let go and decay the water wheel so that the pillar is blocking the chain from going back. This will allow you to jump onto the wheel's platform, so do that and then heal the wheel all the way. You will be at the top of the wheel, so jump to the platform and heal the aqueduct to get the water flowing and the wheel working. A cutscene will occur that will place you in The Grotto.
