The Howlwood is an area in Deliverance.
After freeing Aldea from the zombie invasion, Aurelia's father gives the player a key, which allows the party to enter this area in search of the Air Crystal. They proceed through the forest and discover a hidden village of wolves known as Aru. Arkinneas, the leader of the village, allows the party to borrow the Air Crystal for the time being. He guides the party to the other exit of the woods, which leads to the crystal.
A full map of the area, using in-game graphics, can be found here.