I remember a friend introducing me to this back in HS (this was decades after it was released) and it, as well as several other Zeppelin albums, became our default adventure/day trip music. Of course the magic part was that if we were heading towards the coast we'd literally have to travel to "Over The Hills and Far Away" to get to "The Ocean"—and if there wasn't a lot of traffic the trip take the entire duration of the album give or take a song. You couldn't ask for a better soundtrack.