Search the indicated locations at the listed coordinates on the world
map to find all 16 Mayan Stela puzzles. The first puzzle is part of DNA
Sequence 4: Memory 1 (it cannot be missed). After completing this
memory, the other Mayan Stela puzzles will become available. Some of
them are on islands in dangerous ocean zones; thus, it is recommended to
upgrade your ship and continue through the story to make all locations
accessible. You can also view the Mayan Stela locations on your map if
you synchronize the viewpoints of their respective area. To check which
ones you have found, open the progress tracker, and select the "Mayan
Stela" tab. It provides an overview of islands that contain the secret
puzzles. Once all 16 puzzles have been solved, travel to Tulum. There
will be a marker on your map saying "Mayan Outfit". Go to that location
in Tulum (70, 405 coordinates), and open the secret door to get the
"Vault Raider" trophy, along with the special Mayan outfit. The
following are the exact coordinates of each Mayan Stela puzzle:

1. Great Inagua: Acquired during DNA Sequence 4: Memory 1
2. Cat Island: 734, 694 coordinates
3. Matanzas: 343, 642 coordinates
4. Cape Bonavista: 179, 593 coordinates
5. Tulum: 70, 405 coordinates
6. Pinos Isle: 334, 476 coordinates
7. Pinos Isle: 342, 478 coordinates
8. Tortuga: 876, 377 coordinates
9. Long Bay: 525, 253 coordinates
10. Isla Providencia: 502, 44 coordinates
11. Isla Providencia: 502, 44 coordinates
12. New Bone: 431, 116 coordinates
13. Misteriosa: 303, 199 coordinates
14. Misteriosa: 296, 196 coordinates
15. Santanillas: 217, 245 coordinates
16. Santanillas: 221, 242 coordinates