Impressionen unter Wasser (Underwater Impressions aka Impressions of the deep) is a documentary film released in 2002. It was directed by Leni Riefenstahl. After the premiere of her film Tiefland in 1954, for decades it was generally thought this would be Riefenstahl's last film. However, a few days before her 100th birthday, saw the release of Impressionen unter Wasser (45 minutes, with an introduction by Riefenstahl) premiered in Berlin 48 years after Tiefland.