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.

Dan Snow attempts to use the latest satellite technology to reveal the secrets of the Roman Empire, identifying lost cities, amphitheatres and forts.

Using sophisticated CGI re-creations, this BBC documentary follows the explorations of archaeologist Sarah Parcak, who has developed satellite technology to pinpoint the locations of thousands of buried Egyptian cities, temples and tombs.

It is possible that only one per cent of the wonders of ancient Egypt have been discovered, but now, thanks to a pioneering approach to archaeology, that is about to change. Dr. Sarah Parcak uses satellites to probe beneath the sands, where she has found cities, temples and pyramids. Now, with Dallas Campbell and Liz Bonnin, she heads to Egypt to discover if these magnificent buildings are really there.