Endless possibilties.
Just find the list, then search and use google for access to those towns. Most EUR cities have their own site like www.(name city).country 2 letter extension. They will all have basic info on transportation or links to that system. If there are specific sites for a certain place it will almost always also include transport info.
EU-rail is not a system as such, nor a train company. It is a over 50 yrs old coöperative of all the main state-railways in EUR. Best info on what is available in each country is, no need to ask or tell, the site of that railway. Most countries in north-west EUR (UK excepted of course) have national transportplanners for all means that will also give details of local buses/trams etc. to the final leg to a specific place.