Your favorite song over ten minutes long

By today's standard most non musicians consider any piece of music a song. Technically this would be a symphony, but I didn't know you were being so technical.

I don't have a favourite song over 10 minutes as I think most of them suck because there is so much filler. I'm not a fan of long guitar solos which a lot of the longer songs have. They are too much like improv in Jazz, and while I don't hate Jazz it's not my favourite type of music. I also think that a song over 10 minutes needs to have different movements, which again, a lot of them don't seem to have.

Kashmir - Led Zeppelin about 8.23 (depending on the version).
The Who - I Won’t Get Fooled Again about the same.
Lynyrd Skynyrd - Sweet Home Alabama, same again.
By this point I got bored and said f**k it, can’t go wrong with Gershwin, lol.

Plenty of Iron Maiden to pick from. They like 'em long, just like my wife!