Teesside Park is a retail superstore and leisure development in Thornaby-on-Tees, built in 1988. Located just off the A66 near the A66/A19 interchange, it is split between the unity authorities of Stockton-on-Tees (retail park) and Middlesbrough (leisure park) with the line of the Old River Tees, which runs down the middle of the development, forming the boundary between the two authorities. The development has an eye-catching central building that was constructed in 2008.