These photos demonstrate the phenomenal transformation that has occurred at a former Victorian pumping station in Hackney.
The Grade II listed building is now an indoor climbing centre that is winning awards for its sustainability.
Later today, ITV London will be getting a tour of the Castle Climbing Centre in Hackney, which has recently been recognised at the Sustainable City Awards.
The indoor climbing centre is housed in what was once a Victorian pumping station.
The building is energy efficient, and a patch of waste ground at the back has been transformed into a market garden, which grows organic produce.