Clip | Carthage's Lost Warriors - Kuelap, the giant fortress built by the Chachapoya

Professor Hans Giffhorn was puzzled when he first encountered Kuelap because no other fortress in the whole of America displays similar construction techniques. He knew that fortresses like this were quite common in the Mediterranean region during classical times.

Could the Celts and Carthaginians have made it as far Kuelap, the giant fortress built by the Chachapoya?

Carthage’s Lost Warriors premieres Wednesday, April 2 at 10pm on PBS. (Check local listings)