Pumapunku or Puma Punku
Pumapunku or Puma Punku (The Door of the Puma) located in the Bolivian highlands, Tiwanaku, consist a field of massive but finely carve stones of graphite and diorite (extremely harder stone second to diamond). These stones (also called H Blocks) are cut perfectly straight so that they would interlock like a great maze, having core holes in it, all are of same depth and perfect. Ancient alien theorists believe that carving these stone can be made possible only with modern diamond scaled tools. The second mysterious fact about these stone structures is their weight. These stone were not only hard to cut, but they were also extremely heavy to move or lift. One of these stones weighs in excess of 800 metric tons and they had been moved from 10 miles away quarry. Moving such heavy stones are even today seems difficult.
To built these elaborate and sophisticated stone structures, the ancient people of Tiwanaku would have the knowledge of geometry and mathematics and must had great planning in written but there is no any record, mapping or painting found at the site of Puma Punku.
Proponent of the Ancient alien’s theory claims that intelligent extraterrestrials with advanced engineering crafts and techniques built these mysterious master pieces or possibly guide the people who built it.