The place with the reddish trees, the pink syrupy sap that Nora ate all of so that Jaune didn't get any syrup on his pancakes.  Not gonna lie, Nora, I love you to pieces but that was a bit of a d*ck move.  Just sayin.'  Anyway, some class assignments may bring us here, or other things.  However, like the Emerald Forest, it's crawling with Grimm, many of which are more powerful than normal, older, and bigger.  That Ursa that Jaune and Cardin fought was some serious business.