It is located approximately 15 m to the southwest of the main plaza. It is oriented north-south and is composed of four structures that together form an “I”. The east and west platforms are approximately 2m high and the interior patio measures 3 x 20m. The south and north heads have a height of almost 1.50 m; in the north head a stone engraved in low relief was found showing the numeral 4. It should be noted that originally the stone was located vertically in the center of the head, with the engravings directed towards the playground. Another engraved stone is found in the central part of the interior bench of the east structure and seems to present the calendrical glyph 5 reed.