Bettany Hughes' Treasures of the World S01 E02 Treasures of Malta

The historian travels to Malta in search of ancient artefacts, and leads the first TV crew to be allowed to film in the Hypogeum, a recently discovered underground temple that provided a burial place for up to 7000 individuals. Before a major restoration project starts, Bettany is invited to film in the Queen and Prince Philip's romantic hideaway, the Villa Guardamangia, and explores in a series of underground tunnels from the Second World War.