The Mystery Of Puma Punku -- Ancient Aliens (Season 4, Episode 6)
In dept, modern, analysis of - literally - the most intriguing site on the planet: Puma Punku. Greater than the Great Pyramids of Egypt in building complexity, Puma Punku was probably constructed 14,000 - 17,000 years ago, at an altitude of 12,800 feet, near Tiwanaku, Bolivia.
The complex is composed of megalithic blocks (one weighing up to 800 tons) of granite and diorite (two of the hardest stones on Earth), intricately interlocking to form an amazing and beautiful ancient site - which was also aligned to the stars. As always, the main questions are: who build it and for what purpose?