Final Quest

You turn the unicorn so that it is facing left, and then gently press your boots into its sides. The unicorn sets off at a gentle trot down the path, leaving you with time to look around as you go past.
Surprisingly, this path doesn't seem to show as much decay as the rest of the river. There are still some lovely plants trying to grow along the sides of the path, and you feel a small pang of sadness at this tiny hope for a future. You silently vow that you will do all within your power to restore life to this sad place.
Presently, you notice what appears to be large orange sacks hanging from the trees. What do you want to do?