From WikiMedia
Greenberfield Locks are a flight of three canal locks on the Leeds and Liverpool Canal, located at Barnoldswick in Lancashire. In total they raise the level of the canal by 8.9 metres (29'1 feet).
When they were originaly built they were a stair case set as they still are further east towards Leeds. If you look carefull around you can still see signs of the staircase locks and the rout the canal took originaly.
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