I don't know if there's much love here for drone metal guys like Sunn O))) here, but My Wall is just one of the most impressive songs I've ever heard, both musically and lyrically. The guy doing the vocals is a British guy by the name of Julian Cope, a rock musician with a massive interest in the history of ancient Britain, which features heavily in the lyrics. I know the song is 25 minutes long but the lyrics are only there for the first 12 or so minutes, and it's one hell of a listen.