Rome: What Lies Beneath (2013)

Dan Snow attempts to use the latest satellite technology to reveal the secrets of the Roman Empire. Together with space archaeologist Sarah Parcak, Dan sets out to identify and then track down lost cities, amphitheatres and forts in an adventure that sees him travel through some of the most spectacular parts of the vast empire. Cutting-edge technology and traditional archaeology help build a better understanding of how Rome held such a large empire together for so long.