The dam gates will prevent you from progressing further to the Jungle, and you need to burn the brambles to open them.
Noatun’s Garden has a gold chest that you can find inside one of the ruins in the area.
The Under the Rainbow treasure is one that you can find in the Goddess Falls area in Vanaheim.
To solve the double door puzzle in Myrkr Tunnels, you just have to hit the right surfaces using your axe.
