The title says it. I once realized, that some of my favourite songs are those running pretty long. So here's a collection of it. With the shortest one (yet one of the most epic) clocking in at 7:31 and some tracks quite over 10 minutes. Genres included: Progressive Metal, Sludgecore/Stoner- & Post-Metal, Noiserock, Mathcore, Alternative, Industrial Metal, Black Metal ... 19 Bands/tracks, including Neurosis, Opeth and Killing Joke.
(The picture actually refers to one of the song titles)