Castlefield Viaduct is open as part of a pilot project, offering you the opportunity to explore the viaduct and share ideas about the future of this historic structure. As part of your visit, you’ll discover more about the viaduct’s heritage, as well as exploring an ‘urban garden’ in the sky. Half of the deck has been planted with trees, flowers and shrubs, creating a green space for visitors to unwind in, and learn more about the city’s long relationship with plants and trees. With 5.37 million members, 10,000 staff and thousands of volunteers, the National Trust is now the biggest conservation charity in Europe, caring for more than 250,000 hectares of farmland, more than 780 miles of coastline, and more than 500 historic properties, gardens and nature reserves, for everyone, for ever.