A river runs through it: the global movement to 'daylight' urban waterways

Rivers have been forced to flow underground as cities have developed over time, but Sheffield is the latest to join a global movement to recover these lost waterwaysTucked away in a corner of Sheffield’s cultural quarter, among the graffiti and red-brick housing blocks and a derelict industrial site, lies a green oasis. Porter Brook is a “pocket park” – a small amphitheatre, sloping down to the banks of the river Porter, where wild trout spawn in spring and students from