My historical research took a wander underground recently, partly inspired by the Canynge Square sinkhole, partly by St Vincent's (Ghyston's) cave and its tunnel to the Observatory, and I was surprised to find that there might be an intact tunnel from the Bristol Port Railway and Pier still just sitting there under Bridge Valley Road. A quick search turned up this recent video by an intrepid explorer, so it's definitely still there.
I went looking for the entrances today, and definitely found the south entrance, at the start of the Bridge Valley Path, the footpath that starts with steps at the bottom of Bridge Valley Road. It's easy to miss if you're not looking for it. I think I've figured out where the north entrance is, too, but it was getting dark at that stage and the Portway was still busy enough that crossing the road was still the normal nuisance, so I thought I'd leave further explorations for another day.
I'm glad my friend Lisa joined me today; she drove in from Shirehampton and told me that the Portway was looking rather lovely, so we set off that way. She's also braver than I am when it comes to doing urbex stuff, so this was just the opportunity to take a peek into the Portnalls Number One Railway Tunnel/Bridge Road Deep Valley Shelter whose entrance I'd found on a previous wander.
It was definitely dark and spooky and impressively big, with a side tunnel that Lisa explored that leads to a little door I don't think I've previously noticed on the side of the Portway. I didn't get many photos—even my astoundingly powerful little torch (£) didn't do much to light things up, and you're not going to get much joy hand-holding a camera in that darkness—but I did shoot a little video, which I might edit and add later.
After plumbing the bowels of the earth, we went up Bridge Valley Path to Clifton, explored some bits around the College and Pembroke Road, then came home via Foliage Cafe for coffee. Nice.