Amakumo Peak has a huge puzzle at the bottom of the map which rewards a lot of chests.
Before you can attempt the puzzle, you need to lower the water level first by doing the tile puzzle.
Here’s a walkthrough and guide of the underground puzzle in Amakumo Peak of Genshin Impact.
The location of the puzzle is shown in the map below, marked by the player location.
How to solve the underground seelie puzzle
Once you’ve descended to the bottom, you’ll see a few Ruin Sentinels. Defeat them to unlock the chest and the console.
Then, start the console to lower the water level.
At the bottom, use the red console to release the red barrier.
You will see a seelie inside. Follow the seelie upstairs and you’ll see a red barrier.
Go back down and you will see a yellow console in front of a yellow barrier. Start the yellow console.
Turn on the red console inside.
Before going back up, turn on the yellow console again.
Upstairs, you’ll see two seelies. One seelie will spawn a chest.
Follow the next seelie.
Now, go upstairs and you’ll see a yellow barrier. Turn on the red console beside it.
Now, go down using the hole near the console (instead of stairs). You will see a seelie.
Follow the seelie and climb back up to where the yellow barrier is.
Ensure that the red barrier is blocking the stairs (or you may need to turn the red console again if it’s not). Then, head down the hole where you found the seelie.
You can reach the yellow console from there. Turn it on.
Then use the hole to climb back up.
The yellow barrier is now down, and you will see two seelies.
One seelie will spawn the chest. Follow the other.
Just follow the seelie until it goes through the blue barrier.
Now, follow the unblocked path and head upstairs. Turn on the red console.
Now that the red barrier is gone, turn on the blue console.
Go back upstairs and you will see that a blue barrier is gone. Enter the room and turn on the yellow console.
Go downstairs and the yellow barrier is gone. The blue barrier is also down.
The seelie is inside. Turn on the console and the water level is totally down.
Follow the seelie down and you’ll reach a Luxurious Chest with a Precious Chest. The seelie will give a common chest. And that’s about it.