Lamian Fang KeyFollow

Well, if you are looking for the Lamian Fang Key, you could start by running into the Room of the Three Gargoyles. Push in the right tongue, and a door might open and lead you down a staircase into the Wall Climb. Here you must choose your next path. You could race up to the Observatory, spin the sundial, and pass into the Room of the Golden Idols. Once there, push down on their bases to release the doors. That may take you below or lead you into the Shrine of the Silver Monkey. Assemble the statue there, and you may be headed for the Torch Room. If the elevator is up, you could jump into the elevator and descend into the Mine Shaft. You might climb up the ladder, or plow through the stone wall. Find the key, and it may unlock the Tombs of the Ancient Kings allowing you to climb into the Spider’s Lair. If you escape, you may have a chance to sit upon the Throne of the Pretender. If the correct door is unlocked, you’ll be able to crawl into the Pit of Despair and finally make your way through the Cave of Sighs back to the Lamian Fang Key's ???.

http://www.ffxi-atlas.com/maps/caedarva-mire/general/

First map in the middle, yellow dot. Free key.