This 1.6 km (1 mi) canal runs inland from the River Severn to Lydney. The canal was in commercial use from its opening in 1813 until the 1970s, and after a short period of disuse, was reopened in 2005 after restoration for water purposes.
The lower and tidal basins and connecting lock are historically important and have been scheduled an Ancient Monument, while the swing bridge is a Grade II listed building.
The harbour area is largely unspoilt and has become a marina and harbour for seagoing yachts and motor boats.