We're pretty good on the imagination front - you have to be to enjoy eksploring disused railway lines and ruined castles (our other hobby).
This one was a real treat though - we normally don't find much more than a few railway fences and, if we're really lucky, the remains of a platform, but to find this magnificent structure, unseen from any roads that we'd been down, took our breath away. We've now visited it from all directions (some of them involving scrambling up and down some pretty muddy embankments) and wish we could get a photograph of the whole structure. We just couldn't find a vantage point far away enough.
I am worried that it'll have to be pulled down at some point though if it isn't maintained. There were piles of bricks all around and plants and trees growing out of the structure - at some point it will become a hazard (though in answer to Derek - no, nothing fell on us )
We've also visited the stretch just beside where we're moored at Red Rock. It disappears just before the road by the pub (now called Bridge 63 but I believe it used to be called the Railway). We walked a short way towards Adlington, and intend to do the rest of the walk another day, to try to find out where it crossed Adlington and joined the eksisting railway line, it's difficult to make out on the OS map. We did find what used to be Red Rock Station - now a private residence.