Maze

The points near the stair and the locations where the Guides usually pass are always illuminated with many torches that were put here to also avoid people getting lost. But that room was dark, so they took some torches in the walls and started to walk into it. 

"What is this?" Danton exclaimed seeing a dead body on a spike trap. 

"Probably one of the tourists... you said that all traps were disarmed already." Gremory spoke while examining the dead body, it was still warm and the blood was recently spilled on the ground.

"Every trap was disarmed, but I don't know this place, was not suppose to be a room inside the wall." The Guide spoke, a little scared by what he was seeing.

'So this is why so many tourists get lost here, he somehow activated some mechanism and the wall closed behind his back.' Gremory thought and then realized that everyone was getting in.

"Wait, we need to secure our way out."