At an early stage local archaeologists noticed that many of the petroglyphs on the Rock of the Ingá displayed similarities with writing from the Old World in classical times.
Could the Celts and Carthaginians have made it as far Kuelap, the giant fortress built by the Chachapoya?
Watch the full episode of The Lost Diary of Dr. Livingstone.
Livingstone's unpublished field diaries reveal true desperation and horror during his expedition. Hover and click on the diary for more.
150 years ago, malaria was a mystery to doctors in Africa and the west.
Livingstone charted large parts of the continent previously unseen by European eyes.
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