I have just completed my interrail of Scandinavia and Central Europe. My itinerary was mainly planned around smaller towns and hiking locations. Highlights were Trolltunga, Lofoten, Lindau, Jungfrau, Cinque Terre and the
Scandinavian rail passes: Interrail and Eurail explained - Routes North
Two months interrailing Europe: More than 22,000 km and 300 hours in trains. Did it to see different parts of Europe and for the rides. More details in comments. : r/Interrail