Led Zeppelin's iconic rock song "Stairway to Heaven" was released in 1971. The song features a variety of musical instruments including acoustic guitar, electric guitar, keyboards, recorders, and drums. It begins with a finger-picked acoustic guitar intro and builds layers of instrumentation throughout. The lyrics reference spiritual themes but are intentionally ambiguous. The song progresses from a dark, mysterious tone to brighter sections and builds in texture and intensity until fading away softly at the end. It leaves room for individual interpretation while creating an epic musical journey.