Not finding anything suspicious, despite the pyramid being quite suspicious as a whole, the party advances through the door, finding themselves in a long corridor, that continues for about fourty feet before turning left. Another fourty feet later, the corridor splits, one part going to the right and the other to the left. The right part goes on for about a hundred feet before ending at a wall, but there is a door (let's call it door #1) about half-way on the right side. The other part turns right after maybe thirty feet, then another fourty feet follow with a door left (door #2) and right (door #3) each, and at the end it turns right again. Continuing that way, it turns right once more after thirty feet and left again after another fourty. What follows are about sixty feet of straightness, ending in another door (door #4).