It includes the basements and temples called Building IX or Heizer, Building VI, Building VII and The Palace.

Heizer Building: Built entirely of compacted earth, semicircular in shape. Its extreme southern half is still under the lava remains of the Xitle volcano.

Building VI: It is one of the latest constructions in the area, built approximately between 400 B.C. and 250 B.C. It is located to the west of the Heizer Building on a platform and has a rectangular base.

Building VIII: Like Building VI, it is one of the later constructions. It is located to the west of the Heizer Building and has a rectangular base.

The Palace: Religious and residential building. During its exploration, 24 burials were discovered.