Deansgate is one of the city's oldest thoroughfares. In Roman times its route passed close to the Roman fort of Mamucium and led from the River Medlock where there was a ford and the road to Deva (Chester). Along it were several civilian buildings and a mansio in the vicinity of the Hilton Hotel.[2] Part of it was called Aldport Lane from Saxon times. (Aldport was the Saxon name for Castlefield.) Until the 1730s the area was rural but became built up after the development of a quay on the river.

The Great Northern Warehouse is the former railway goods warehouse of the Great Northern Railway in Manchester city centre, England, which was refurbished into a leisure complex in 1999. The building is at the junction of Deansgate and Peter Street. It was granted Grade II* listed building status in 1974.

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Castlefield Viaduct is a 330 m (1,080 ft) 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

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.

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