Undertow is Tool's first full-length album, released in 1993. At the time, grunge was at the height of its popularity, and pop punk was slowly beginning to gather mainstream attention. Undertow helped heavy metal remain prominence as a mainstream musical style, and allowed several later bands to break through to the mainstream. Allmusic sees the album's success in the "striking, haunting visuals that complemented the album's nihilistic yet wistful mood" — it was eventually certified double platinum by the RIAA on May 14, 2001. The album was recorded between October and December 1992 at Grand Master Studios, Hollywood, California, by Read more on Last.fm.