Is there a song that is considered an epic masterpiece, a must-know, recognized by national charts and radio station listeners as best [your country]’s song ever, is covered a lot, is played at festivals and brings people together singing it

The Finns have this awesome ballad Joutsenlaulu by Yö (R.I.P. Jussi Hakulinen). And it is – as someone put it – basically a local Stairway To Heaven hit