Witch's Marsh prorsus

Ico's name was a shadow of simplicity compared to that of Germanicus, who met expectations with a name that felt more like a description than anything else. Ico really could be prone to idolization, and so it was with this stony fellow, the guard with watchful eyes.

And one of the most intriguing things about him was that he was not of Ursus — he was from beyond, a world about which Ico had offered wondered even as he settled in the Valley. Such was his curiosity that he could not help but speak it, even though he was sure Germanicus would prefer they fall silent and focus on the hunt.

May I ask... what is the Stream of Whitebark like?