Muse: United States of Eurasia
I pretty much love this album, and most of their work in general. This song in particular just has such a sweeping sound, what with the interspersion of massive piano sections reminiscent of Lawrence of Arabia and Indiana Jones, and then the outro, which is basically just one big exhalation... Me likey.
Apparently the Holy Father, Pope Benedict XVI appreciates them as well: musewiki.org/Pope_Benedict_XVI
Share your favorite epic songs of epicness in the comments!