It has the second largest ball court. The Cop n River has eroded the edge of the city, giving scientists a cut-away view of what is inside the temple construction. The Maya usually built on top of their old monuments, going higher, wider and fancier. So the buildings are like a series of nesting blocks.
Damage caused by the river allows a rare look inside their method of building.
Cop n has 3500 mounds in the 9 square miles around the temples. There is a Hieroglyphic Staircase. Built in the year 743, the staircase tells the official history of the ancestors of King Smoke Shell. It is the most complete history of kings found in any Maya site. The kings of Cop n enjoyed feeling important.