The Tar Tunnel
Unfortunately the Tar Tunnel is closed to visitors in 2025.
This 1,000-yard (914 metre) tunnel was dug out in 1786 to bring coal out of the mines at river level. However miners struck a spring of natural bitumen which was then harvested to use in industry.
William Reynolds subsequently built the adjacent Hay Inclined Plane to connects the canal at the top of the Gorge the river level.
Explore our sites

Sign up to our mailing list
Register your email with us and we’ll keep you up-to-date with news, events and offers.