Archaeologists have been left baffled after they discovered a rare piece of Romano-British engineering that went terribly wrong. A team from the Museum of London Archaeology (Mola) were excavating a site in Cambridgeshire when they found the remains of two wells, with the discovery revealing “a failure of Roman engineering on an industrial scale”, an archaeologist said. The remains were found during the final weeks of excavations for the National Highways improvement scheme on the A428 Black Cat to Caxton Gibbet road on the Cambridgeshire-Bedfordshire border. During the dig, the team uncovered…