"Cabinessence" (also typeset as "Cabin Essence") is a song by the American rock band the Beach Boys from their 1969 album 20/20 and their unfinished Smile project. Written by Brian Wilson and Van Dyke Parks, Wilson described the song as a "rock and roll waltz" about railroads, while Parks offered that the pair were attempting to write a song that would end on "a freeze frame of the Union Pacific Railroad". The instrumentation includes banjo, cello, dobro, bouzouki, fuzz-tone bass, trumpet, accordion, and percussion that was arranged to sound like the pounding of rail spikes.