It's easy to travel Poland by rail. The state railway company in Poland is called Polskie Koleje Panstwowe (PKP). There is a national InterCity railway network which links 20 major cities via regular interval service on various routes.

Eurail Poland passes are valid for Poland travel, and the Eurail Germany-Poland pass is also valid on all trains operated by PKP and Intercity JSC. The passes are also valid on all regional lines including KM Koleje Mazowieckie and Przewozy Regionalne. Eurail passes are not accepted on trains operted by Arriva PCC, Koleje Dolnoslaskie, and Kolege Mazowieckie on the Warsaw-Gdynia route. PKP also offer international train service to Amsterdam, Berline, Prague, Vienna and Hamburg during the days. There are luxury international trains to Budapest, Prague and Berlin which also operate overnight trips.