Minty Donald, Malú Cayetano and Nick Millar. A walk tracing the course of a river in Madrid that is now hidden under urban development. It starts at the Rio Mazanares where a large pipe allows the Pardolongo stream/arroyo to flow into the rio Manzanares. It is surrounded by trees in a park and opposite is a Water treatment plant. The sounds will be running water, birds and maybe humans