We’re back in Saudi Arabia this week, working with the Riyadh Development Authority, a government department that is responsible for developing the infrastructure of the capital. Their projects include transport, parks, libraries, and roads. We’re making a documentary about the river network that runs through the city, feeding into Wadi Hanifa. Over the past 15 years the city has been working hard to restore and renovate the rivers, which had become neglected and polluted during the development of the city. Today the entire river network is being reborn as a beautiful public resource, forming one the longest, continuous urban parks in the world.