The Ambergris Key treasure at (30, 157) is the Corozal Treasure Map reward, found by swimming through Ambergris Key’s underwater tunnel, resurfacing in the ruins, then turning left into the small cave before climbing farther inside.
This buried chest is easy to miss because Ambergris Key also contains a separate treasure map that points somewhere else. For the (30, 157) chest, you want the map picked up in Corozal, then the underwater route into the ruins at Ambergris Key.
Corozal map reward at Ambergris Key
| Detail | Value |
|---|---|
| Required map | Treasure Map from Corozal |
| Map pickup area | Corozal, on the north/northeast beach by a campfire and corpse |
| Dig location | Ambergris Key (30, 157) |
| Route clue | Enter through the underwater tunnel and follow the jellyfish-marked cave |
| Reward | Pirate Captain outfit and Reales |
KEY!The Ambergris Key (30, 157) dig spot is tied to the Treasure Map from Corozal. It is not the treasure map found inside Ambergris Key itself, so make sure the clue you are solving sends you to 30, 157.
The Reales payout varies across player listings: most put it at 2,000 Reales, while one lists 2,400 Reales. The Corozal map pickup coordinate also appears as both (11, 242) and (31, 230), but the actual pickup description is consistent: check the north or northeast beach near the campfire and corpse.
Route from shore to the Ambergris Key cave
Travel to Ambergris Key, or sail there if you have not opened fast travel yet. From the shoreline, get into the water facing the rocky opening ahead, then line yourself up with the center of that visible gap before going under.
Once submerged, look for the large jellyfish group. That cluster is your best sign that you are on the right underwater path, because the swim through the cave is longer than it first looks.
Keep swimming through the tunnel until you surface inside the ruins. As soon as you come out of the water, do not head deeper into the ruins first; the treasure is in the left-side cave nook close to where you resurface.
Turn left as soon as you resurface in the ruins; the dig prompt is in the small cave ahead, before the climb into the higher Ambergris Key area.
How to get Ambergris Key treasure in Assassin’s Creed Black Flag Resynced
This route starts with the Corozal map and follows the underwater Ambergris Key path straight to the dig prompt.
STEP 1/11
Pick up the Corozal map
Go to the north or northeast beach in Corozal and loot the corpse by the campfire for the treasure map.
STEP 2/11
Check the target coordinates
Open the map clue and note that the buried treasure points to Ambergris Key (30, 157).
STEP 3/11
Travel to Ambergris Key
Fast travel to Ambergris Key, or sail there if the fast travel point is not available.
STEP 4/11
Enter the water by the rocks
From the shore, get into the water and face the rocky opening ahead.
STEP 5/11
Line up with the opening
Aim yourself toward the middle of the visible gap before descending.
STEP 6/11
Swim down into the tunnel
Go underwater and begin following the cave route below the opening.
STEP 7/11
Use the jellyfish as your marker
The large jellyfish group confirms you are on the correct underwater path.
STEP 8/11
Follow the long cave route
Keep swimming through the tunnel until it brings you out inside the Ambergris Key ruins.
STEP 9/11
Surface near the ruins
Come up from the water and look toward the ruins immediately to your left.
STEP 10/11
Enter the left cave nook
Turn left into the small cave area instead of climbing farther into the ruins.
STEP 11/11
Dig on the floor ahead
Move to the floor ahead in the nook and use the dig prompt to collect the Pirate Captain outfit reward.
Video help
Wrong turns near the Ambergris Key ruins
The most common mistake is climbing too far into the smuggler or pirate area after resurfacing. The (30, 157) dig spot is before that climb, tucked into the left-side cave or dead-end nook near the first ruins area.
Another easy miss is searching the larger ruins chamber too early. If you are moving toward higher platforms, enemies, or the deeper smuggler den route, you have likely gone past the chest.
Reset your position by returning to the spot where you surfaced from the underwater tunnel. Face the nearby ruins, turn immediately left, enter the small cave, and look for the dig prompt on the floor ahead.
Ambergris Key map points to Misteriosa
The treasure map found inside Ambergris Key is a different objective. That map sends you to Misteriosa (271, 178), not to the Ambergris Key (30, 157) dig spot from the Corozal map.
If your clue is pointing to Misteriosa, you are solving the Ambergris Key map. If it points to 30, 157, return to the underwater route and left-side cave in Ambergris Key.
Frequently Asked Questions
Do you need the Corozal Treasure Map before digging at Ambergris Key?
Yes. The (30, 157) treasure in Ambergris Key is the reward for the Treasure Map from Corozal, picked up from the beach area near a campfire and corpse.
Where exactly is the dig spot after you resurface in Ambergris Key?
After surfacing inside the ruins, go immediately left into the small cave or nook. The dig prompt appears on the floor ahead before you climb farther into the ruins.
Is this the same as the Ambergris Key Treasure Map?
No. The Ambergris Key Treasure Map is found inside Ambergris Key and sends you to Misteriosa (271, 178). The Ambergris Key (30, 157) buried chest comes from the Corozal map.
What reward do you get from the (30, 157) treasure?
The chest gives the Pirate Captain outfit plus a Reales payout, commonly listed as 2,000 Reales.
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