To the south of the vestibule is located this area, which begins with a plaza where there is a street that leads to different rooms, several with small altars that possibly functioned for religious worship.

Building 18: During its exploration, the doorway was discovered and restored.

Building 31: In the northeast corner there is a 2.30 m high wall, with a narrow slab that protrudes; this architectural detail has been called ixtapaltete, a fashion imitated from Teotihuacan.

Building 33: Two construction periods can be observed here. The oldest, near the door, maintained a straight stairway, and in its sides two more were added in semicircle, characteristic element of the constructions of the Sierra Gorda. The second stage, built on top of the previous one, is differentiated by the straight stairways.