appearing in locations and time periods he couldn't have naturally reached; the penultimate episode reveals that the tunnels somehow contain portals across time and space, which Williamson has been exploring in an attempt to find a way to stop the Flux. References Notes Works cited Further reading External links Official Site of the Williamson Tunnels Heritage Centre The Official Site of the Friends of Williamson's Tunnels (FoWT) and audio/headlines/37868742 Digging into Liverpool's mystery tunnels - BBC News Magazine report 2016 (video) Liverpool's Lost Williamson Tunnels Unearthed - BBC News Magazine report 2013 (video) Archaeological sites in Merseyside Edge Hill, Liverpool Folly buildings in England History of Liverpool Tunnels in Liverpool Museums in Liverpool Subterranean buildings and structures Tourist attractions in Liverpool Historic buildings and structures in the United Kingdom Buildings and structures in Liverpool History of Merseyside