The music of the enigmatic Sigur Rós has captured the imagination of fans from around the world, and they never back down from pushing the limits of their sounds. Now they've taken that same attitude with their first concert film, which is more of a journey through their on-stage production than a simple collection of live footage. It's also a visual documentation of one of the most ambitious tours in music history, which took the band to some of the most remote regions of their homeland and beyond.