Songs that are longer than 6 minutes

Metallica - Nothing Else Matters 6min 26seconds.

Got married a few weeks ago and had the band play it for our first dance.
Ok, so the thread title says "one song" but looks like that's being ignored (#standard lol) so here are mine.......I am seeing "Video Unavailable" a lot on this thread (I suspect it's because I'm in the US) so apologies if I've inadvertently duplicated anything.

Anyone, if I could only pick one long song it would be this...."The Mariner's Revenge Song" - Decemberists