Subways of Your Mind

"Subways of Your Mind" is a song by German rock band Fex, recorded c. 1983–1984. In the 2000s, a recording on a cassette tape from a radio broadcast in the mid-1980s was uploaded online and garnered significant attention. The song remained unidentified, even after being uploaded to the Internet, prompting a 17-year-long search to identify the artist and song title. During this search, the song earned the nickname "The Most Mysterious Song on the Internet".

The song was recorded from a West German Norddeutscher Rundfunk (NDR) radio broadcast during the mid-1980s, likely around 1984. In 2019, it became the subject of a viral Internet phenomenon, with many users of sites such as Reddit and Discord collaborating to identify the song and recording artist.

In November 2024, the song was identified as "Subways of Your Mind" by Fex, a rock band from Kiel. Confirmation came with the release of a 1983 EP featuring a demo version of the song, as well as a recording of a 1985 live performance. On 12 January 2025, the daughter of the band's keyboardist Michael Hädrich posted to the Reddit community formed around the song that her father had found a cassette copy of the studio version that had been played on NDR. The copy was released as a digital single the following day. However, the 1/4 master tape containing this version has yet to be found.

Throughout the search, other unknown songs have been discovered. Users online have coined the term "lostwave" to describe songs of this nature.