A team of urban explorers have accessed all the tunnels and culverted rivers that run under Bristol city centre, and for the first time mapped them out in one entire video.
The team, led by veteran urban explorer Matthew Williams, travelled into the maze of underground rivers and tunnels by boat from the Floating Harbour close to Castle Park View.
The video, which has now been published on the 'Secret Vault' YouTube channel, is more than an hour long, and consists of ethe explorers traversing along the tunnels either on board a boat or, when water levels are too shallow, by wading through the water, with the route of each section of each tunnel explained using a satellite image showing the route from above ground.
