In Chapter 5 you will see the first chest during the cutscene.
After the cutscenes ends go right.
In the cave between the two streams of water there is a stone, which can be broken by Igniculus.
After you pass the second stream of water fly downwards to meet another opponent. On his right, there is an entrance to a cave - fly inside it. Avoid all the traps and go downwards to find a chest.
Another chest can be found at the very bottom, below the enemy on the right.
On the left, there are two stones, which can be broken by Igniculus - one is at the very bottom, while the other one is at the top.
After you meet Norah, go right to find another message.
Another chest is located directly above Norah. Go up and then turn right gently.
Another chest is on the left.
The stone, which has to be broken by Igniculus is in the water stream to the left of Norah.
At the very bottom there is another chest waiting for you. After leaving Norah, go downwards to find it.
After you push the block of wood off in order to open the passage, wait a little bit. Fly leftwards and avoid the trap. From there, go down. After you see the great doors, use tchem to enter a location filled with collectibles. Slowly, fly downwards.
The first chest can be found on the left (while you are flying down).
Another two objects can be found a bit later. The chest is located at the very bottom, while the stone (which can be broken by Igniculus) is hidden inside the wall.
Another stone is located at the very bottom on the left.
The chest is located between two traps, to the right of the stone.
Another one is just on the right.
To get more collectibles you need to go back, and then go down. There, you will find a chest between two traps. Then go left, and fly up the moment it becomes possible. Pull the lever to open the next door. Again, you have return to the top by roundabout means.
After you reach the top, grab the wooden block and push it to the left. On your way, you will notice a stone, which can be broken by Igniculus.
If you throw the wooden block off and jump after it, go right. In the dark, there is a hidden chest.
After you move the wooden block to the right spot you will be able to reach a place hiding 3 chests, a stone, and a letter.
After you go through the door on the bottom, you reach another location with a stone and a chest.
When you leave this location and go to the other side avoiding the fan with thorns, fly downwards. In the center, you can find a chest.
Another chest is located behind another passage on the left (you can find it at the very bottom).
Above on the left are four chests. You can reach three of them with no difficulties.
To reach the next chest you need to fly down and enter the cave. Then fly up and avoid the trap.
To the left, you can find an entrance to a cave, in which there are doors with a red symbol that will take you to another location with rising lava. You have move quickly and avoid lava. At the end of this trap you will find a chest and a stone.
Another chest can be found after flying upwards - it is hidden on the left, inside the mountain's wall.
After you reach the top of the mountain that looks like a man's face, you will find another chest.
Below the man's head there is a way down. Go there, and you will find a chest and a stone.
Another chest is located to the left of the previous one.