vii – Twice a year, a hatch in a busy Lisbon street opens to reveal steps leading to one of the Portuguese capital’s most ancient sites: a 2,000-year-old Roman structure that still holds the buildings above it together. Dating back to the first century AD, the “cryptoportico” subterranean maze of tunnels and passageways was built by the Romans, who occupied the city then known as Olissipo beginning around 200 BC.
xi – Drought helps expose the secrets of a Roman city. Archaeologists have taken advantage of the lack of rain in Spain to reconstruct the framework of Augustobriga, an ancient hub which was flooded seven decades ago when a reservoir burst
xii – Spanish beach reveals archeological treasures set in sand. Archaeologists have stumbled upon an ancient Roman fish farm, a salting plant and a 3,500-year-old Bronze Age tomb – finds of considerable historical significance, only possible because of the massive slopes of sand shaped by the driving Levante wind
xiii – The Roman city walls in Lugo, Spain, are considered the only Roman structure that experienced the powerful empire’s domination, yet it is still in almost perfect condition
xiv – Flavia Sabora: Lost Roman town is rediscovered under a crop field in Spain. University of Cádiz researchers used georadar to locate the ancient settlement, which has documented traces of streets, thermal baths and other buildings