You'll find that there are some very distinguishing characteristics to this place...
Galder, as you mentioned the word desert- it almost certainly is, as you cannot see any evidence of rainfall- no vegetation, of the slightest kind, anywhere.
But... this is not like a desert you have ever seen. You are walking on earth. But it is hard earth, solid, cracked earth. There is no soil, no top layer. In fact, there is something you cannot help thinking you are missing about this valley you are in.
"It's almost certainly NOT in this part of the planet," says Kuylen.
Rah, your senses guide you. You find Saar by your side, who is doing the same thing. And within 10 minutes you have found something that is almost certainly what Kuylen wanted- the metal plate of a trapdoor built into the surface.