Kelp'thar Forest is very heavily phased and is a directed-questing experience. Following the breadcrumbs throughout the three zones of Vashj'ir is straightforward, leading to a natural storyline progression. The other 80-82 level-up zone is Mount Hyjal. The quest chain of Mount Hyjal also starts from the Cataclysm auto-quests in Stormwind and Orgrimmar and drops players off underneath Nordrassil, the world tree.