In the newest quest for the 2.4 update in Genshin Impact, you’ll be required to find two remaining key sigils to enter Enkanomiya.
Both of the locations are marked but one of them is underwater.
Here’s how you can find the key sigil underwater in Genshin Impact.
How to find the key sigil
The key sigil is located in a cave from a previous quest where you had to deal with some mechanisms. If not mistaken, it was the Moon-bathed deep quest.
The entrance to the cave is shown in the map below, marked by the player location in blue.
You should see a small pathway, just beside the waterfall. It’s quite high up.
Once you’re inside, defeat the Fatui guarding the place and you’ll get the key sigil.