While exploring the Ameyalco Waters, you will come across a small cave with a locked gate. The mechanism next to it requires two Keys to Somewhere to unlock. If you are curious about what is inside, you can find the keys here.

When you first enter the small cave in front of the Rainbow Spirits Domain in Ameyalco Waters, you’ll find an enemy camp and a locked gate. Defeat the enemies to clear them out and receive a Chest reward. Meanwhile, the locked gate can be opened by interacting with the mechanism in front of it, which requires two Keys to Somewhere. You won’t have to look far, as both keys can be found in the same cave.

The first Key to Somewhere can be found in a smaller cage next to a torch on the other side of the cave. Interacting with it is enough to get the key.

The second Key to Somewhere is easy to miss (at least I did the first time!). It’s dangling from a rope just in front of the locked cage. It’s a bit high up, so tall characters can’t reach it, even if they jump.