Led Zeppelin-Led Zeppelin III (1970)

Led Zeppelin demonstrated with their album "III" that their horizons were infinite, creating an album that far removed from the rock and blues of their first two albums, they entered the fields of folk and acoustic sounds with wisdom and an amazing mastery.
At a time when Jethro Tull dominated the style of folk rock, Led Zeppelin even manage to surpass them at times with wonderful compositions like "Tangerine", "Friends", "Gallows Pole" or "Bron-Y-Aur-Stomp".
However they do not completely abandon their characteristic sound and demonstrate them with the frenetic "Immigrant Song", the blues "Since I've Been Loving You", the rhythmic "Celebration Day".
Another masterpiece that would precede the masterpiece of the group and rock in general such as Led Zeppelin "IV"