The Terokkar Forest is home to a wide variety of beasts, creatures and enemies for your player to fight through.
The main Alliance settlement here is the walled fortress of Allerian Stronghold.
The Horde equivalent is Stonebreaker Hold.
One of the major chains in this zone is the investigation into what caused the destruction of a druid settlement just outside Shattrath City. You eventually discover that some of Kael'Thas Sunstrider's Blood Elf followers are responsible, having created a powerful weapon called a mana bomb that is capable of destroying all life in a large area. You are able to infiltrate their base, called Firewing Point, and destroy it using their own weapon against them.
Hidden high in the mountains in the southeastern part of the zone is the arrakoa city of Skettis. Unlike some of the peaceful arrakoa that live in the Lower City of Shattrath, these hostile birdmen are seeking a way to return their former ruler, Terokk, to life. Skettis is only reachable by players with flying mounts, and offers a variety of daily quests with which players can gain reputation for the Shattari Skyguard. High enough reputation allows players to purchase a fancy nether ray flying mount.
In the southern part of the zone lie the Bone Wastes, an abandoned, haunted and bleak wasteland. The destruction of a powerful artifact deep within the underground tombs of Auchindoun caused the entire portion of this zone to become uninhabitable, except for the restless spirits who roam.
The Ring of Observance inside the ruins of Auchindoun offers players gates to four instances within the tombs of Terokkar Forest, each one housing a unique and potentially devastating threat.