In 1969, Led Zeppelin released their sophomore album titled Led Zeppelin 2, which is widely regarded as one of the greatest rock albums of all time. A year later, they followed up that album with Led Zeppelin 3, which diverged from the path that their first two albums took. Where as the first two albums were driving rock albums, this one, while it didn’t lack for driving rock songs, dove pretty heavily into the acoustic realm. The album was panned at first but is now regarded among their best.