The Dog Who Travelled by Train (Polish: O psie, który jeździł koleją), also known as Lampo, the Travelling Dog, and The Traveling Dog, is a 2023 Polish-language adventure children's film directed by Magdalena Nieć and written by Mojca Tirš and Marcin Siemiątkowski. Produced by Canal+ Polska and K&K Selekt Film in Poland, it starred Liliana Zajbert, Mateusz Damięcki, Monika Pikuła, and Adam Woronowicz. The film premiered on 25 August 2023. The story revolved around Zusia, a 10-years-old girl struggling with an illness, befriending a dog named Lampo, who used trains to travel across the country. It was loosely based on 1967 children's book O psie, który jeździł koleją by Roman Pisarski, which in turn was inspired by the life of dog Lampo in the 1950s Italy.