The Cavern of the Sun is a cave found in the Zahhab Region in Endless Ocean: Blue World. Its entrance is located on the cliff face of Super Drop-Off at a depth of 40 meters at coordinated F-4. After travelling through a short tunnel, you will find yourself sharing the small cave with the game's only Zebra Shark, a Flathead Fish, and a zoom-mode spot containing two Yellow Boxfish and the Dorado coin. Turtle skeletons litter the cavern floor, and the legendary Bedouin Treasure can be found here.
Once the player has completed the Guidance of Apollo quest, you will also find the Turtle Shell Tank resting here atop the more complete turtle skeleton near the back of the cavern.