Incontinent or Lost Continent?
It's a George Pal film, who around this time in his career was playing fun with fantasy adventure films, even bringing some cartoonery and science into his equations. Atlantis, the Lost Continent is not a particularly good film, but it is a fun one if you have any sort of idea what to expect from this sort of production.
Plot basically pitches a Greek fisherman to the task of bringing an Atlantean princess back to the supposed mythical city of Atlantis. He does, and soon wishes he hadn't since he is not welcomed and Atlantis might be coming to the end of its... read the rest.