section_path: Construction/Preparation of the site
section_name: Preparation of the site
paragraph_text: Preparation of the site
  
  A hillock forms the base on which the pyramid stands. It was cut back into steps and only a strip around the perimeter was leveled, which has been measured to be horizontal and flat to within 21 millimetres (0.8 in). The bedrock reaches a height of almost 6 metres (20 ft) above the pyramid base at the location of the Grotto.
  
  Along the sides of the base platform a series of holes are cut in the bedrock. Lehner hypothesizes that they held wooden posts used for alignment. Edwards, among others, suggested the usage of water for evening the base, although it is unclear how practical and workable such a system would be.