The Sea Salt-Crusted Key can be found in the Minacious Isle area of the Golden Apple Archipelago 2.8. See the key's locations, how to get it, and how to use it in Genshin Impact!

Sea Salt-Crusted Key Location

Found in Minacious Isle

The Sea Salt-Crusted Key is found under the small island west of Minacious Isle's Original Form. If you're in the lake island, there's just water on the map and you can't access that location.

Note that you have to complete Mona's event quest to unlock the Sea Salt-Crusted Key!

How to Get the Sea Salt-Crusted Key

Get the First Sea Salt-Crusted Key in the Underwater Ruins

Sail to the ruined island west of Minacious Isle and jump into the hole by the Waverider Waypoint. You can ignore the puzzles for now and go into the hole in the wall. Destroy the rocks by the Hilichurl and look for a sparkling spot in the next area. Investigate to get the Sea Salt-Crusted Key!

Get the Second Sea Salt-Crusted Key in Minacious Isle

The second Sea Salt-Crusted Key can be found in a vase just inside the room that the first Sea Salt-Crusted Key opens.

How to Use the Sea Salt-Crusted Key

Sea Salt-Crusted Key Gate Location

Used in the Thus Was the Work Done in Vain Quest

The Sea Salt-Crusted Key is used to open a gate in the ruins of Minacious Isle's Place in Water. It's the version where there are no islands to the west of Minacious Isle. The entrance to the ruins are south of Minacious Isle.

Opening this gate is part of the ''Thus Was the Work Done in Vain'' world quest found in Minacious Isle!

Thus Was the Work Done in Vain Quest Guide

How to Get to the Sea Salt-Crusted Key Gate

1. Use two switches to open a gate in the ceiling.
   
2. Go through the ceiling gate and into a room full of Hilichurls. The gate that the key unlocks is in that room!
   

Going through the gate you unlock will lead you to some Starlight Coalescences. You can check out our guide for how to get them!
Starlight Coalescence Locations

How to Use the Second Sea Salt-Crusted Key

So far, we have not discovered a way to use the second Sea Salt-Crusted Key found in Minacious Isle. We will update this guide once we find out more!

Let us know in the comments if you found a way to use it!

Genshin Impact Related Guides

2.8 Archipelago Guide

2.8 Archipelago Map Guides

2.8 Archipelago Puzzle Guides

2.8 Archipelago Quest Guides

2.8 Archipelago Event Guides

2.8 Archipelago Events
Summertime Odyssey	Resonating Visions
Reminiscent Regimen	Surfpiercer

All Genshin Impact Events

List of Events