The Forest of Trees is a wooded area that was the main setting of "Another Way." The forest is filled with many dangers, such as the Acid River, the Trap Bridge, and the Forest Cyclops. It is a vast forest, as seen in views from parts of the episode and has many rivers, including a waterfall, though it is unknown if the rivers are connected and make one body of water. Unlike most forests seen in the show, most of the trees are evergreen trees. It appears that the forest is close to the Tree Fort, as Finn was able to reach the forest in a short amount of time while wearing a cast on one foot.
Hair Fall-Off Path is a wooded area that Finn did not travel through it due to the fact that it makes one go bald, hence its name, and the path taker will never able to grow it back again. Stump refers to it by saying "There's the path on the left: Hair Fall-Off Path. No more hair again, ever!" Only the woods and the beginning of the path are seen, so it is unknown what the Hair Fall-Off Path looks like. Stump tells Finn to take the Smelly Path instead of the Hair Fall-Off Path after feeling intimidated.
Smelly Path is a path curses one to smell bad, and stay like that for the rest of their life. Just like Hair Fall-Off Path, it wasn't traveled through or seen, but only the entrance to it was seen. The Stump suggested that Finn take the Smelly Path over the Hair Fall-Off Path because the "Smelly Path is actually not that bad."