Souvenirs d'un autre monde (French: [suvniʁ dœ̃n‿otʁ mɔ̃d]; English: "Memories From Another World") is the first full-length album by French band Alcest, released in August 2007. The title refers to the meaning behind the music of Alcest, as its leader and songwriter, Neige, sees it as a journey through his memories of a distant world he has been in contact with.

Although it is representative of future works, the album differs greatly from Alcest's first release Le Secret, distancing itself further from Alcest's original sound, and going more into post-metal and shoegaze-like direction while keeping some of the black metal part of the sound. It is the last release in which Neige plays all instruments, as he was joined by drummer Winterhalter on subsequent releases.