Ancient Americas: the South American Stonehenge (opens in new tab)

One of the largest archaeological sites in South America, located near Lake Titicaca in Western Bolivia - Tiwanaku is a brilliantly mysterious place. Believed to have been founded around 200BC, Tiwanaku is filled with monumental structures, mighty monoliths and incredible ceramics - but who built it? And why?In the final episode of our Ancient Americas series, Tristan is joined by Dr Alexei Vranich to help shine a light on this spectacular site. With 20 tonne stones carried from miles away, a...