Chester Roman Amphitheatre is the largest stone amphitheatre yet found in Britain, though less than half of it is on show. The rest lies under Dee House, a fire-blackened Georgian convent school where shadowy figures are said to haunt the empty upper floors.

Built for the garrison of Deva Victrix, the arena staged beast fights in the morning, executions at lunchtime and gladiators in the afternoon, under the eye of a shrine to Nemesis, goddess of vengeance. When the games ended it became a dump and a quarry, its stone recycled into St John the Baptist’s church next door.

VoiceMap’s self-guided audio tours come at it from two angles. One hands the commentary to a wisecracking gladiatrix and to Æthelflæd of Mercia, who reveals the arena’s long afterlife. A ghost walk asks why Chester’s bloodiest spot has no Roman spectres at all.