20,000 Leagues Under the Sea (1954)

In the 1954 film "20,000 Leagues Under the Sea," based on Jules Verne's novel of the same name, a marine scientist and his crew encounter a mysterious and advanced submarine called the Nautilus, captained by the enigmatic Captain Nemo. Together, they embark on a journey beneath the ocean's surface, encountering various underwater wonders and dangers. The film explores themes of exploration, technology, and conservation.