Going to California by Led Zeppelin

To all my fans, this is another one on the periphery of Progressive Rock. I know Zeppelin had been termed Acid Rock and Hard Rock and everything else. I am not sure it ever really was called progressive, but as you listen to the riffs and the style, it really does fit within many of the same parameters. From wikipedia: Going to California" is the penultimate song performed by the English rock band Led Zeppelin on their fourth album, released in 1971. The song's wistful folk-style sound, with Robert Plant on lead vocals, acoustic guitar by Jimmy Page and mandolin by John Paul Jones, contrasts with the heavy electric-amplified rock on several of the album's other tracks. The song is reportedly about singer/songwriter Joni Mitchell, with whom Plant and Page were both infatuated. In live performances of the song, Plant would often say the name "Joni" after this stanza (which is thought to have referenced Mitchell's 1967 composition "I Had a King"): To find a Queen without a King, they say she plays guitar and cries, and sings" In an interview he gave to Spin magazine in 2002, Plant stated that the song "might be a bit embarrassing at times lyrically, but it did sum up a period of my life when I was 22." In a 2007 interview with the same magazine, Plant stated that the song was about "Me reflecting on the first years of the group, when I was only about... 20, and was struggling to find myself in the midst of all the craziness of California and the band and the groupies ...