Kelethin is the wood elf treetop city built on wooden platforms high in the canopy of Greater Faydark, the ancestral home and starting city of wood elves and half elves. It is technically part of the Greater Faydark zone rather than a separate instance, so there is no zone line entering it, only lifts up from the forest floor. The open-air city hosts druids, rangers, bards, rogues and warriors along with all their trainers and merchants.
The greatest hazard in Kelethin is the city itself: the platforms have no railings, and a misstep sends you plummeting to the forest floor for potentially deadly fall damage. New players routinely die from falls while navigating the lifts and walkways, so move carefully and use the lifts rather than jumping between platforms.
Learn the lift locations early and always look before you step to avoid fatal falls off the unrailed platforms. If you fall to the ground, use the marked lifts to return, and hunt the safe newbie mobs directly beneath the city where guards can assist.
Zone data is early and community-sourced, so confirm details in-game.