This is the approach to the western portal of the Gosty Hill Tunnel on the Dudley No. 2 Canal,
It's 577yds long with no towpath and very low in places; requiring re-arrangement of our, not inconsiderable, wood stash on the roof before we continued.
This crazy picture shows a ghostly head with the caption, "Hawne Basin 1 mile". All the lights are from the tunnel light on the boat behind - I think some of the light is reflecting back off of our smoke.