The place Charles "found" was a Beastman's meeting hall, where the Beastman officers convened, indeed quite "clean."
The adventurers were quite pleased with this "campsite"; after a brief cleaning, they cleared a large area.
Lord Leo, though cautious, only felt he might be overly suspicious. Trusting in his own strength, he didn't mind, having his two servants lay out a thick blanket to rest for a while and recuperate.
His two servants loyally stayed by their master's side, keeping Lord Leo separate from the group of adventurers.
Nobody noticed that Charles had disappeared.
By now, Charles had ventured deep into Machu Picchu fortress, standing alone on a desolate path, staring into the deeper parts of the fortress.
This desolate path marked the boundary of the maze-ification of Machu Picchu.
He could sense that the mazeification of Machu Picchu was pushing some entities deeper into the fortress.
"Machu Picchu fortress actually harbors some weird entities, huh!"
