You earn this achievement by collecting all 5 journals at the Shrine of Tribute in The Ancient Isles at G18 on the map
Journal 1: Shrine of TributeShortly after entering the Shrine, you will swim down into a room that forks left and right. In this room is a Siren Statue Puzzle mural.
Facing the mural, turn around, and you will find a journal sitting on some rubble next to some dark red coral. Read it, and you will have uncovered your first secret!
Journal 2: My Friends!From the mural, swim South down a tunnel leading away from the mural. As you swim through several rooms, you will come to a room covered in bright blue coral as well as the first Undersea Vent down this path.
At the base of the Undersea Vent is the following journal. Read it, and you will have uncovered your second secret!
Journal 3: The Warrior and the Sea QueenFrom the second journal, keep swimming forward, away from the mural. You will eventually reach the large Siren Statue holding a conch. Swim past this down the tunnel that leads East.
You will swim into a room with dark red coral and a little stone compartment on the wall to your right. On the lip of the stone compartment is a journal. Read it, and you will have uncovered the third secret of the Shrine.
Journal 4: The Sea Queen's ArmyYou can find this journal after solving the Siren Statue Puzzle and raising the water level.
After raising the water level, you will have access to a path on the East side of the room with the large throne statue. At the top of the path, you will find yourself at the top of the chamber. Walk South and then jump across the large throne statue to the other side.
Jump across the statue to find a journal sitting on a coral platform. Read it, and you will have uncovered the fourth secret of the Shrine.
Journal 5: Mermaid GemsYou can find the last journal after solving the Floor Plate Puzzle at the top of the Shrine. Once you solve the puzzle, the giant throne statue will move, revealing a secret area. Swim to the back of the area to find a large stone altar with the journal resting on it. Read the journal to uncover the final mystery of the Shrine!
VideoCredit:
https://rarethief.com/sea-of-thieves-shrine-of-tribute-secre...