 The site was built on a platform covering 6 hectares ( 650 @,@ 000 sq ft ) . The principal architecture is located in the <unk> , which occupies seven south @-@ facing terraces on the northern side of the platform , rising 71 metres ( 233 ft ) over the plaza below . It has a more distinct geometry than at most Maya sites , with a right @-@ angle relationship between most structures . 
