There's plenty of side content, too, including Our Witcher 3 walkthrough and guide can help you with the main story, including the Wandering in the Dark and Family Matters missions, and eventually, one of several Witcher 3 endings. Within the cavern you'll find the chest tucked behind some stalagmites and the diagram inside of it.
Head to Trottheim on the same island and head south to find another cave.
Kill off the enemy you find inside and you'll be able to take the diagrams from his cold dead hands.ġ Hardened Timber Enhanced Feline Gear and Armor locations Then head back to the main cavern to unlock the door at the back of it. Kill the drowners to claim the Laboratory Key at the bottom of the pool. Turn the levers so that they're all facing in to the small area between them all and a pool of water will open up. Once you've done so exit out the left side of the cavern and you'll come to a room with some statues. Go inside, dispel the illusion, and you'll have a Golem to fight. If you head around to the west of the island and hug the outside of it as you head north you'll find a path that leads down to a cave.
On Temple Island there is a hidden cave to the northwest of the island. A bit more legwork for this collection of diagrams.
