"Captain Nemo and the Underwater City" is a 1969 film poster, referencing an adaptation of Jules Verne's novel "20,000 Leagues Under the Sea." The story centers around Captain Nemo, who builds an underwater city named 'Nupcidia.' The movie poster likely promotes this specific film version, which was produced in 1969 and features Captain Nemo's continuing adventures beneath the ocean waves, with a focus on the discovery and exploration of an underwater metropolis. The film is part of the broader adaptation of Verne's works into various media formats, showcasing an early exploration of science fiction undersea settings in popular culture.