Treasure map is an item found in the Message in a bottle on Cyclosis. Talking to Quartermaster Gully with this item in inventory allows the player to travel to the previously uncharted island of Cannonball Run, where players can talk to The Cannonballs to receive one taijitu.
The message in a bottle that contains this treasure map was last visible 3 days ago on 3 August. It will be visible again in 3 days on 9 August. (wrong?) Once a message in a bottle is found and when a player has walked near its spawn location when it was visible it will always be visible, unless the message in the bottle or its treasure map is in the player's bank or inventory.