Possible cundeth

Couldn't get any closer to this thing because of barbed wire and other nasty hazards, but I held the camera out as far as I could, and you can just make out a stone archway, over the entrance to a tunnel that leads under the railway track. It takes a small stream from the limekilns side of the railway to the other side where it flows into the River Ellen. I now plan to approach it from the other side whenever I get the chance.

Done