People unafraid to go deep down were in for a treat when they walked along the bottom of a Sowerby Bridge lock.
Last weekend, visitors had a rare opportunity to stand in lock two of the Rochdale Canal to take a close look at the working heritage.
The 200-year-old lock, which features original mason’s marks from the men who worked on it, is undergoing maintenance until March 3.
Pennines customer operations manager, Steve Ballard, said: “I’m delighted people turned up to learn about what we’re doing and why it’s so important.
“Visitors heared about the interesting history of the canal.”
Richard Parry, chief executive of the Canal and River Trust, said: “We care for a remarkable network of historic waterways which are still working just as they were designed to 200 years ago.
“Keeping them open and safe requires a huge amount of planning, investment and craftsmanship and involves a wide range of experts, from civil engineers and hydrologists to heritage experts and ecologists.”