Stories Crane Park Island's Sluice This Audio guide was produced by Theo Harrison, James Ferris, Jojo M, Dennis Watson, Jayden L, Emiliano Haskurti and Seb Rennie Text from the audio guide: If you look down into the channel here you will see a curved mark on the wall. This is where a water wheel used to turn to power machinery linked to the gunpowder production. Where the Island is now was a large pond which held the water that could be released to turn the water wheels. You can see remains of the sluice gate mechanism that controlled the release of water from the mill pond as you cross into the Island. This is a good spot to see the grey herons that like to fish from this point. In the spring you may well hear the loud croak of marsh frog. The aim of the Keeping it Wild programme is to empower and inspire 600 young people aged 11-25, from backgrounds currently under-represented in natural heritage, to gain vital skills while discovering, conserving and sharing their experiences of the capital’s wild spaces. Headliners are working in partnership with London Wildlife Trust, John Muir Trust, and London Youth to inspire the young people to investigate the issues facing green spaces and to engage with nature through social action projects and traineeships.