Twice a year, a Lisbon street opens some steps leading to a 2,000-year-old Roman structure, the "cryptoportico" subterranean maze of tunnels and passageways.
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
Over time, it is not unusual for ancient structures to become buried and neglected. However, in the bustling streets of Lisbon, a hatch opens twice a year.