Hidden City Riddle
From WikiRaider
The Hidden City Riddle is an Artifact in Shadow of the Tomb Raider. It is part of the Path of the Stars collection and can be found in Cozumel.
To find the hidden city, go South along the shore until you find the [[|Pink Fish|pink fish]]}. Then chase the heart of the serpent to the silver-crowned mountain where the Twins confer.
Artefact description in the game inventory