Williamson Tunnels

The Williamson Tunnels were a series of tunnels beneath Liverpool, built under the direction of Joseph Williamson.

Williamson was working on the tunnels in 1820. James Stonehouse argued that they were without purpose, though Williamson argued that he was preparing for "the cataclysmic". (TV: The Halloween Apocalypse)

Alfie's granddad, who was working on the construction, reckoned there were dining halls and bedrooms. According to some claims, there was an army in the tunnels. (TV: Survivors of the Flux)

After Joseph Williamson's death, that took place long before 1904, the tunnels were shut down and all the work was stopped. (TV: Survivors of the Flux)

In 2021, the Williamson Tunnels were being excavated. By that time they had become a tourist attraction. (TV: Survivors of the Flux) The Museum of Liverpool contained an exhibit on the Williamson Tunnels on 31 October 2021. (TV: The Halloween Apocalypse)

Behind the scenes
In the real world, the tunnels' true purpose is unclear, and is the subject of much academic speculation.