An image of the first steam train going through the Thames Tunnel, after the tunnel was opened on the 9th January 1843TThis image shows the first steam train travelling through the Thames tunnel, which was firstly used for pedestrians to walk through. This was a big moment in history because without this being done, we wouldn’t be able to get to places like London fast like we do now! So much money had been made by tourists going through the tunnel that it could be eventually be developed to transport cargo under the river, like in the picture. However, it wasn't a very nice place for the train drivers to work because it often got very smoky and hot as there were no ventilation shafts!