Blackwater Park is the fifth studio album by Swedish progressive metal band Opeth. It was released on March 12, 2001, in Europe and a day later in North America through Music for Nations and Koch Records. The album marks the first collaboration between Porcupine Tree frontman Steven Wilson and the band, as Wilson had been brought in to produce the album. This contributed to a shift in Opeth's musical style. The songs "The Drapery Falls" and "Still Day Beneath the Sun" were released as singles. Although Blackwater Park did not chart in North America or the United Kingdom, it was a commercial breakthrough for the band. Often considered their magnum opus, the album was highly acclaimed among critics, with Eduardo Rivadavia of AllMusic stating that the album is "surely the band's coming-of-age album, and therefore, an ideal introduction to its remarkable body of work.” In 2020, Loudwire listed Blackwater Park as the number one progressive metal album of all time. Rolling Stone ranked the album as 55th on their list of 'The 100 Greatest Metal Albums of All Time.' Production Following a few live dates in Europe, Opeth's guitarist and vocalist Mikael Åkerfeldt went to an old friend's house in Stockholm, Sweden, to record some demos and develop ideas for the new album. The album is named after the German progressive rock band of the same name and was the first album for which the group had a title before they started recording. This album featured heavy input from Porcupine Tree frontman Steven Wilson, whose relationship with Opeth had begun in the past when an interviewer, who was a friend of Åkerfeldt's and knew the latter was a fan of Wilson's work, gave Wilson a copy of Opeth's then-latest release Still Life, which Wilson ended up liking so much that he contacted Åkerfeldt about it. A few months after the making of the demos, Åkerfeldt was having dinner with Wilson in which the two discussed the idea of Wilson producing the next Opeth album. After Åkerfeldt sent Wilson the demos he had recorded, Wilson agreed to produce the album. Opeth entered Studio Fredman to begin work on Blackwater Park on August 10, 2000. The band had no previous lyrics written and had only rehearsed three times before entering the studio. The band's engineer Fredrik Nordström had arranged for the group to stay in a small room in the studio that