you need to do monkey madness and go to this guy at the bar place in the trees in tree gnome stronghold (i think his name is Dario) and ask to go in and do the puzzle fly to a island then go on a boat and you will be at ape atoll.
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If your talking about where it is in Runescape. It is in the commons in within Ape Atoll. Look for the scimitar icon on your mini map.
Waymottin is a gnome found in the Ape Atoll Dungeon. He can be found once you arrive at ape Atoll at the (!) before actually entering the city. You must then bring some Energy pots to run by the maze as well as 1 prayer pot to use protect from melee.
To get to the Crash Island in RuneScape, you must be either in the process of, or are finished with the quest Monkey Madness. Crash Island is used to get to the Ape Atoll. To get to Crash Island, go to the Grand Tree. Then, go to the second level and go east. Speak to the Gnome with a mask on. He will bring you to the Hangar. Speak with the pilot near there, and he will bring you to the Crash Island.
One location is south-west of castle wars. Also, Ape Atoll, south-east, near the cave entrance. Look for the rare tree icon, in the minimap or world map.For additional locations, search runescape.wikia.com for "teak tree".
He is at the end of ape troll dungeon