English: Puma Punku, group of monolithic blocks. The layer made of the monolithic panels of red sandstone. Which were fastened together with special clamps. ( See: http://en.wikipedia.org/wiki/Pumapunku citation: " Notable features at Pumapunku are I-shaped architectural cramps, which are composed of a unique copper-arsenic-nickel bronze alloy. These I-shaped cramps were also used on a section of canal found at the base of the Akapana pyramid at Tiwanaku").