It looks like the Stirling Bridge has a second tunnel like the one in the video, on the otherside and then a further two service tunnels in the middle, with all four possibly being seperated from each other. The two in the middle have apparentely been painted up but I haven't gone back to check it out yet.

The door was left open about six months ago so I was able to go check it out one night on my way home. I'm defo not a fan of this tunnel, especially as the access holes are smaller and the tunnel was getting so much smaller towards the end plus it was just pretty feral for so many reasons!

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