John Martin’s Underworld is an interactive story told through Twitter which began on 4 November.

Previously in John Martin’s Underworld

The story from this week…

In Underworld London, Elena took a short-cut through Southwark Town Hall, which transformed when she entered it into a Victorian meeting place of some sort, full of fantastical sights including a giant snake and a depressed reindeer. She pressed deep into the building, passing through many rooms full of bizarre displays, until she came upon a painting which seemed to draw her in, and in, and in… S

he was faced with a burning, blackened city falling into a pit. Followers identified it as Pompeii and Herculaneum. She watched Lot’s wife disappear in front of her eyes. She turned away, promising never to look back…

In the final week, Elena must come to a decision. How should she get home?