During my game, I pay attention to the landscape a lot in order to take all my screenshots. And I was amazed by this area at the center of the Cerobi Steppe in particular : 

@giza-rabbit and @trickstercandy you also thought it was suspicious and that it looked like a boss arena. You know what ? we were right

This is the place where we fight Slyt, the second guardian of the Pharos.

Now this is so best screenshot I could take of the location of the fight against the third guardian Fenrir :

We can see the Paramina Rift way down below, and it is more exactly the  Silverflow’s end area. But the boss location is too high above to see anything from down there. We can recognize the triangular shape and the almond-shaped rock.

And my favorite, the location of the first guardian, the Pandemonium

Here is a cap from the view I had before the fight. It is clearly Nam-Yensa so I looked for the place.

This is the platform where we are before the Pandemonium fight, above the 

Withering Shores. Turn around and you see this : 

You can recognize the tree with the pink flowers, the two rocks in the sea, the small shore, the three trees in front of the structure, and that rounded rock on the left.

and YES the structure is missing when we are looking for the Pandemonium. I like to think this means the projection we are sent into during each fight are not simple hidden areas, but also a projection from the past.

@chaoticrice @skystones @livvyplaysfinalfantasy