@fireweed@sakurajima.social sweden is kinda far but you can easily take a full day to ride trains (i did that a few times between france and finland) make sure you look at the interrail pass if you do, it's messy to use but it makes it a lot cheaper if you travel a lot.

Also if you go to italy, their train system sucks so make sure you only get direct trains or you'll likely have to pay out of your own pocket if you miss a commute because of a delay

i can't really recommend anything tho cuz everything has nice places, it just depends on what you want to do, what you want to eat and how much money you are willing to spend