Castlefield Viaduct

Castlefield Viaduct is a 330 m disused railway viaduct built in 1892, which used to carry heavy rail traffic in and out of the Great Northern Warehouse, located in the Castlefield area of Manchester, England. It closed in 1969 and stood unused, though has been regularly maintained by National Highways.

The Grade II listed viaduct was designed by Heenan & Froude, the same engineering company behind Blackpool Tower. The viaduct is part of the Historical Railways Estate.

Sky park
Plans by the National Trust to turn it into a 'sky park' were unveiled in June 2021, with the work starting in March 2022.

The viaduct had a test-opening from summer 2022 to summer 2023, during which time visitors had free guided visits.

In July 2023, the National Trust was granted an extension by Manchester City Council to keep the sky park open until autumn 2024. In addition, landscape architects BDP are to develop plans for the next phase of the viaduct.