“Ah-ah, ah! We come from the land of the ice and snow…” – With this primal howl, Robert Plant and Led Zeppelin hurl us straight into a Viking epic. But Immigrant Song, the explosive opener of Led Zeppelin III (1970), isn’t just a headbanging riff. It’s a battle cry of conquest, resilience, and adventure, born from a real trip to Iceland that turned a simple tour into a proto-metal manifesto.