"No Line on the Horizon" is a song by rock band U2; it is the opening and title track on their 2009 album No Line on the Horizon. An alternate version, "No Line on the Horizon 2", was included as a bonus track on some versions of the album. The song was developed during the band's earliest sessions in Fez, Morocco, and began with a drum beat by drummer Larry Mullen, Jr. The lyrics were inspired by a photograph of Lake Constance, titled Boden Sea. Many reviews of the song compared it to the band's other guitar-heavy songs, including "Elevation", "Vertigo", "Zoo Station", and "The Fly".