More The Witcher 3 Guides:
- Console Commands (Cheat Codes).
- Complete Achievement / Trophy Guide.
- Guide for Stutter Free Smooth Gameplay.
- Combat Guide (Some Useful Tips).
- Gwent Card Collector Guide.
- Death March Walkthrough.
- Useful Tips and Tricks.
It's an off the map under water chest in The Witcher 3: Wild Hunt. It always gave high tier loot and decent coin in all my play throughs.
It's located near the ransacked village. Clear the drowners below the small cliff (as you can see where I'm standing and the monster guarding treasure icon on the map).
And swim your way to the mark I have shown. It's a short swim so don't worry.
The chest is beside a rock. It's gonna be a bit tricky to get it because you're out of the map bounds and you'll be teleprted back so you'll have to be quick.
As you can see a couple of pictures.