You will start this side quest after visiting the Mayan temple in Tulum and placing the first Mayan stone into the mysterious door James Kidd leads you to during the "Overrun And Outnumbered" quest.
To uncover the mysteries held within the Mayan Temple, Edward must collect keystones scattered all over the world.

1. Collect all Mayan stones
You must visit all locations where the Mayan Stelae are located, solve the associated puzzles, and collect all 16 Mayan Stones.
- Cape Bonavista Mayan Stela
- Cat Island Mayan Stela
- Great Inagua Mayan Stela
- Isla Providencia Mayan Stela #1
- Isla Providencia Mayan Stela #2
- Long Bay Mayan Stela
- Matanzas Mayan Stela
- Misteriosa Mayan Stela #1
- Misteriosa Mayan Stela #2
- New Bone Mayan Stela
- Pinos Isle Mayan Stela #1
- Pinos Isle Mayan Stela #2
- Sacrifice Island Mayan Stela
- Santanillas Mayan Stela
- Tortuga Mayan Stela
- Tulum Mayan Stela

2. Open the Mayan door
Once you collect all the stones, return to Tulum, enter the ruins, and approach the mysterious door, then interact with it. Edward will automatically insert all the stones into the slots on the door, opening the passage.

3. Uncover the secrets of the Mayan temple
Head inside and move forward. You need to reach small stone ruins that you will see ahead of you and above. The climb is linear and relatively simple, with a small scripted event along the way that might briefly raise your blood pressure.

4. Equip the Mayan armor
Once you reach your destination, approach the armor stand and interact with it to take the armor.

And that is the end of this quest. In addition to the armor - Mayan Outfit, a new trinket will also appear in your inventory - Yax Tun Pendant.
