Roman theatre of Cartagena, Spain

© Luis Davilla/Getty Images

Roman theatre of Cartagena, Spain

A surprising discovery was made here in the city of Cartagena in 1988 during the construction of a new shopping centre. The remains of this ancient Roman theatre were found buried underground, where they’d been hidden for centuries, partially covered by the city’s Old Cathedral. The theatre has since been painstakingly restored. Archaeologists say it was constructed sometime between 5 and 1 BCE and at one time could hold up to 6,000 spectators.