Devil’s Eye Caverns is another underwater secondary location featured in Assassin’s Creed IV: Black Flag and it should be explored in order to find a new upgrade plan for the Jackdaw.
Devil’s Eye Caverns requires the diving bell, and includes 10 collectibles that can be retrieved. Two of them are Animus Fragments, and eight are treasure chests.
Unlike other similar areas in the video game, Devil’s Eye Caverns is a zone in which you won’t have to worry about sharks; however, you will encounter multiple urchins, eels and jellyfishes.
The following AC4 guide provides information on the collectibles you have to find in Devil’s Eye Caverns.
Assassin’s Creed IV: Black Flag Devil’s Eye Caverns Collectibles Guide
Total number of collectibles: 10
Animus Fragments: 2
Other activities: N/A
Assassin’s Creed IV: Black Flag Devil’s Eye Caverns Chests Locations
The first treasure chest in Devil’s Eye Caverns, is close to the diving bell, inside a shipwreck.
Stay away from the urchins and jellyfishes while diving inside the wreck, and loot the chest to get 169 R and a gold ring (100 Reales).
The second chest is north from the previous one, near an air barrel. Look for it on the bottom of the ocean, under another shipwreck and loot it to get 279 Reales.
When you reach the northern section of the caverns, you will be able to find the third chest which is protected by a moray eel.
It is also located under a shipwreck and if you loot it you will get 118 Reales and a golden compass (75 R).
Continue to swim north and eventually you will reach another air barrel. Next to it you should see a shipwreck and a glowing hatch. Open the hatch to get inside and collect the fourth chest which contains 1000 Reales.
After you get the collectible, look around for a new tunnel that will take you to the western area of the caverns.
As you swim north you will find the first air pocket. Dive and look around to see the fifth chest near the entrance to the next tunnel you have to follow. Inside the chest you will find 325 Reales.
Chest 6 & 7
The next two chests are on the ground close to each other. You will find them in a cave above the water. One of them contains 273 Reales, while the other one the Elite Swivel Guns Plan.
Once you loot the previous two chests look around for another diving spot and perform a Leap of Faith in the tunnel below.
Dive to find the final chest, and then follow the tunnel nearby to return to the diving bell.
Assassin’s Creed IV: Black Flag Devil’s Eye Caverns Animus Fragments Locations
Animus Fragment 1
The first Animus Fragment in Devil’s Eye Caverns should be collected after the second chest. Follow the main tunnel towards the northern side of the area, and look for an entrance on the left side of the said tunnel.
When you reach the dead end you will find the fragment.
Animus Fragment 2
The second Animus Fragment can be retrieved after the fifth chest. It is on the left side of the main tunnel behind a large rock similar to a pillar.