What Mysterious things has you interested the most?

I'm interested in the Most Mysterious Song on the internet for those who do not know I'll pull a page out of Wikipedia

"The song was reportedly recorded from a Norddeutscher Rundfunk (NDR) broadcast sometime in the mid-1980s, likely during or after 1984.Since 2019, this song has been the subject of a viral Internet phenomenon, with many users of sites such as Reddit and Discord involved in a collaborative effort to search for the origins of the song. Through the search, other unknown songs were discovered. Users have coined the term "Lostwave" to describe songs of this nature.*

"A man named Darius S. recorded the song from a radio program that he listened to on the West German public radio station NDR. Darius recorded the song on a cassette tape, which also included songs from XTC and The Cure. It has been speculated that the song was recorded in 1984, since most of the songs on the cassette recording were also released around 1984. Further evidence that supports this as being the earliest possible airing date was the Technics tape deck that he most likely used to record the song, which was manufactured in 1984 as well.To get clean recordings of songs, Darius purposely removed dialogue from radio hosts, which is likely why the exact airplay date and the title are unknown.

In 1985, Darius created a playlist consisting of the unidentified songs in his personal collection; he eventually digitized it in 2004, saving the songs as .aiff and .m4a files. Then, Darius's older sister, Lydia H., gave Darius a website domain as a birthday present, which he used to raise awareness of his playlist.

On March 18, 2007, Lydia brought the search to the internet, in an attempt to identify the song. Going under the pseudonym "Anton Riedel", her search originally began on de.rec.musik.recherche, but she eventually migrated to websites with song identification tools, upon the request of user Andreas Eibach. Lydia posted a digital snippet of the song to best-of-80s.de, a German fansite devoted to eighties synth-pop and to spiritofradio.ca, a website dedicated to the Canadian radio station 102.1 The Edge, under the pseudonym "bluuue"

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It's very interesting and i would like to figure out on what's behind the Most Mysterious Song on the Internet