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A huge Maya city has been discovered centuries after it disappeared under the jungle canopy in Mexico.
Archaeologists found pyramids, sports fields, causeways connecting districts and amphitheatres in the southeastern state of Campeche. The have called the complex Valeriana.
No pictures of the city exist, so the BBC's Georgina Rannard shows us a virtual rendition of what the city might have looked like.
Video and graphic by Gwyndaf Hughes