Neptune Towers was a dark ambient side project formed in 1993 by Fenriz of Darkthrone. He released two albums under this name, Caravans to Empire Algol (1994) and Transmissions from Empire Algol (1995), both issued by Moonfog Productions. Fenriz began recording a third Neptune Towers album, Space Lab, in 1994, but it was not finished. Both albums were reissued by Peaceville Records in 2012, with excerpts from Space Lab appended to Transmissions from Empire Algol.