Head of Steam, formerly known as the Darlington Railway Centre and Museum, is a railway museum that is located on the 1825 route of the Stockton and Darlington Railway, which was the world's first steam-powered passenger railway. It is based inside the station building at the North Road railway station. Its exhibits are devoted to the area formerly served by the North Eastern Railway with a particular focus on the Stockton & Darlington Railway and the railway industry of Darlington.
No. 25 Derwent was designed by Timothy Hackworth and built by William and Alfred Kitching in 1845 for use on the Stockton and Darlington Railway. It spent many years on display with Locomotion No. 1 at Darlington Bank Top station before being put on display in the museum.
Built in 1885. This engine was designed by Henry Tennant and Thomas W. Worsdell for use on express trains. It spent a large portion of its preserved career on display in the original York Railway Museum.
Built in 1919. This engine was designed by Sir Vincent Raven for use on heavy freight trains. In the 1980s, it was loaned to the North Eastern Locomotive Preservation Group which restored it to working order. It then spent several years working on the North Yorkshire Moors Railway before its withdrawal. It was put on display in the museum during its refurbishment in 2008.